LONDON IN MARCH WITH A 15 YEAR OLD

The Harry Potter studios are an absolute must do for any fan - book your tickets now. It's absolutely amazing (and we've seen the traveling exhibition in NYC, and both Wizarding Worlds in Japan and Florida).
There's also a Harry Potter walking tour featuring places from the movies. You can go with a guide or download the instructions and do it yourself.
www.the-magician.co.uk/

We really enjoyed the London Bridge Experience - seriously terrifying.
www.thelondonbridgeexperience.com/

Camden Market is a great place for teens to shop and for international food too.

I also like Portobello Road market, and Borough market for food.

We did a James Bond inspired speed boat tour of the Thames a couple of years ago which was awesome.
www.thamesribexperience.com/

Boots and Superdrug stores are the best places for make up. There are lots of brands available. No 17 is Boots own brand for young people.

Lots of people shop at Primark for cheap, fast fashion. There are branches all over the country, but I know there's a huge one on Oxford Street.

Not sure about restaurants - but if you want 'pub grub' at a decent price head to a Wetherspoons pub. They're everywhere and won't break the bank. There's one just near the entrance to the Tower Bridge tube station with a great view of the Tower of London.
londonist.com/london/drink/11-of-the-best-wetherspoons-in-london

Hope that helps:)

Man -- you are in London -- think of some history and culture as well! Yes - do the Harry Potter -- but also consider Parliament, Buckingham Palace - the civic touristy stuff -- then maybe a bit of theater - the Globe Theater --- some world class museum! Yes -- do fun stuff (well - I think everything I mentioned is fun stuff), but I think a 15 year old is also old enough to get some of the "serious" stuff that is in most great cities!

The Tate Modern art gallery if your DD likes art in any form - my girls loved it (we went to the London one when eldest was 15 and the Liverpool one when youngest was 15).

London Eye is great, you can get tickets that include a boat trip and/or admission to several other places such as Madam Tussauds.

Oxford Street is THE shopping street
Accessorize (jewellery, purses and other cute stuff)
Boots The Chemist (pharmacy and department store will have lots of different make up counters, from own store brand to luxury, NYX is touted as being an on trend cheap but 'as good as the best' brand, even my make up snob DD will have stuff from them
Top Shop, H&M, Dorothy Perkins, Miss Selfridge, Monsoon, New Look, Primark, River Island for clothing stores (New Look is a good, cheaper option for current teen fashion)

I would definitely check out doing an afternoon tea somewhere - such a wonderfully girly treat
londonhotelsinsight.com/2014/11/14/top-10-london-hotel-afternoon-teas-we-crunch-the-numbers/

If she is a "foodie", I wouldn't miss Harrods Food Hall and, honestly, even if you weren't a foodie, it is pretty unbelievable. We bought a few things from the bakery section and the extensive chocolate section and then took them to Hyde Park. We rented a paddle boat and had a little picnic with our Harrods treats. It was a lot of fun!

If your 15 year old is a HP fan, it's worth splitting up to see.  It's an EASY train ride - and Warner Brothers picks you up from the train terminal to transport you to the studio.  Take your teen and let your husband spend some time in London doing something you guys aren't as excited about - although I will say, my husband is no big HP fan, but really enjoyed the tour.  The sets, special effects, etc are really interesting, even if you're not a big fan.

Check what exhibitions will be on at the V&A they often have really cool fashion exhibitions. My teen loved the shoe and the McQueen ones.

Make up - Boots or Superdrug (they are drugstores and they do drug store brands and high end depending on the size of the store. Check out Barry M or Sleek). Selfridges is a nice department store to wander around. Less stuffy than Harrods, but full of designer and some quirky stuff.

Another vote for Camden and Covent Garden for quirky. For mainstream fashion head for TopShop and then for fast fashion that's on trend now - Primark.

I spent last spring break in London with my (then) 15 year old DD, visiting my niece who was studying at Queen Mary University of London, so I can tell you what we loved. It was a fabulous girls trip. My favorite book for planning was Frommer's Easy Guide to London 2016. Between that guide book and Trip Advisor, we found great advice.

Our very favorite outing was a half day food tour called "Eating London." It was a guided tour of an older area of London called Shoreditch. It began at Spitalfields Market and wound all around local landmarks, pubs, and restaurants. We sampled a wide variety of food at seven or eight different local favorites, including Poppy's, the best fish and chips in the city. Our guide was amazingly knowledgeable about the history and food culture of the area, along with showing us all kinds of famous street art. I highly recommend it. DD and I are both foodies, so we also enjoyed Borough Market with all the amazing food vendors. DD wanted to do High Tea, which was such fun.

For shopping, we loved the quirky Liberty of London, the food halls of Marks and Spencer, Selfridges. DD had fun exploring Topshop, Uniqlo, Primark, and a couple others around the Oxford Street tube station. We loved people watching around here. DD enjoyed Chinatown where we ate at a neat ramen place and she had her first bubble tea.

As far as historical London, our hands down favorite was the Tower of London. Plan to arrive early at opening to avoid the crowds and have time to soak it all in. Westminster Abbey is best early in the day to avoid the crowds too. I was surprised at how small it actually felt inside, but it is a place that is packed full of history in every tiny nook and corner. Just amazing. We all enjoyed the British Museum. I think we could have spent days there! If the weather is nice, take a walk along Whitehall from Westminster to Trafalgar Square. We purchased another book while there that had great self guided walking tours.

We are probably in the minority, but we were underwhelmed by the London Eye. It was just too commercialized, from the endless queue that wound you around strange wax figures advertising Madame Tussauds to the cheesy photo ops before you loaded and then again at the end of the ride (complete with the hard sell push to purchase said pictures in the gift shop upon unloading), it just wasn't worth the rather steep price of admission to us. It was rather like an amusement park log flume ride

We traveled all around town on the Tube, with occasional hops onto double decker red busses. It is dead easy to navigate the Tube, but you will need Oyster Cards for payment. You can purchase Oyster Cards before you leave via Visit Britian Oyster Cards can be used to pay for most all public transportation in London. Pick up a Tube map before you go to get a general feel for the city and plan your adventures. Have a great time! London is an amazing city! Feel free to PM any questions too, okay?

We took our kids a couple years ago and they LOVED that Harry Potter studio tour. Plan almost a full day for it because it takes awhile to there and back. You can also visit platform 9 3/4, which is fun. Highly recommend Camden Market area as well. Lots of yummy food and interesting handicraft vendors. Theres is a food tour through Camden Market that we have taken. We also LOVED going to high tea at one of the fancy hotels. Delicious food and such a fund atmosphere to people watch. See a show.

Sure - it's actually in rooms inside/under London Bridge so it's quite creepy. Visitors are lead through a series of rooms themed rooms with actors explaining the history of the bridge. For example, there's a punishment room where they discuss torture methods and how the various 'instruments' were used, a street scene where they talk about a Jack the Ripper, etc.
The part that is very scary is the last part which was like a haunted house, with actors jumping out at you. However, I think you can request that the actors not be involved if you are scared.
The London Dungeon is a similar attraction. But less scary and way more crowded.

GO SEE A SHOW!

Curious Incident of the Dog in the Night Time is still in London, I think, when you'll be there. It's one of the coolest pieces of theatre I've ever seen, and the main character is...15. That or Cursed Child would be awesome. Aladdin and American in Paris are also up, I think.

Camden Market was fun. I would take a teen there. I just want to go back and eat there. Ha!

I also thought the Tower of London was amazing. Do the Beefeater tour - They're free and they're AWESOME. It will help give your teen context for what she's seeing.

Have fun!