Greetings!

I'll be in London for a couple days as a solo traveler before I meet up with my tour organizer and start a whirlwind tour of Europe. I've planned out a tentative itinerary for my time in London but I figured I'll ask the FT community for ideas because you always seem to have the best ideas.

I'll be staying at the Imperial Hotel (in Russell Square).

Here's what I'm thinking, as of now:

Dec 26 - Land at LGW at 9:30 AM. I have a day and night ticket for The Shard with a 3:00 PM arrival time for my first trip up. I also have tickets to a 5:30 PM whiskey tasting on the London Eye. After that, I'll head back to The Shard for my evening trip to the viewing platform. HOWEVER -- a friend just asked if I wanted to see the Chelsea vs. Watford match at 3:00 PM, which I'll probably do (and just burn the tickets for The Shard/London Eye). He was planning on going with a friend but that friend had to cancel so he has an extra ticket.

Dec 27 - I have a ticket for the Harry Potter Studio Tour with a 12:30 PM arrival time. I'm a big Harry Potter fan so it's something I'm looking forward to. However, I don't have any evening plans so I'm open to suggestions.

Dec 28 - A free day. The tour meets at 6:00 PM at the Imperial Hotel. I was thinking of going to Greenwich to see the observatory and International Date Line but that's not a "must-do."

I'm not a big history or art buff so a lot of the historical sites and museums would be lost on me.

In case you're wondering, here's the rest of my trip: http://www.flyertalk.com/forum/trip-...m-i-crazy.html.

Thanks in advance for your advice!

P.S. I'm still trying to figure out transportation from the airport since the Gatwick Express will be closed for track repairs and public transportation is on a reduced schedule because of the holiday. I'm thinking of using airportdirect.com but would love to hear other options.

P.P.S. What's the best option for cell service? I have an unlocked iPhone 6. I know I can get a SIM card when I land in London but don't know how (if) the rates will change because of my travel between the different countries once I join my tour group.