LifeonWr, if your girls want to meet Graham Norton, they have a good chance of getting to be in the audience at a recording of the show. You have to email the producers, give the first and last names of up to six people, and they will let you know if you can come. I went before, and it was very amusing; the warm-up was funny, Graham popped his head out in between slots and made unrecorded, unscripted jokes, and it was free too.
I’d also recommend Windsor Castle. It’s the oldest and the largest inhabited castle in the world, and it’s in really good condition. The town of Windsor is also quite nice, and Eton College is another place to visit nearby. Since you’ll be there in Summer you could go to Windsor Great Park, too. I’ve taken numerous tour groups to Windsor and they’ve always come away happy. If you want to see Hampton Court, then some coach companies do combined Windsor/Hampton Court day trips.
The Queen does actually live at Windsor in the Spring and early Summer, and you’ll know she’s home because they fly a different flag; you might well see her go past in car, but that’s as close as you’d get!
Sample other cities within a couple of hours of London that are worth visiting: Canterbury, Stratford-Upon-Avon, Oxford, Cambridge ( of the two, I prefer Oxford), and a place that I’d definitely recommend is Brighton. It has a pleasant beach - though it’s stony, not sandy - some outdoor entertainers, loads of beautiful, original shops in ‘the Lanes,’ (teenagers and adults would both like them), the Royal Pavillion, and of course the pier and funfair.
A slightly different way of travelling to these small towns would be to hire a mini-bus and driver. I can get a 16-seater minibus for £50 for the day, but it might be a little more for other people. Check out train fares for groups and family groups too; last Summer, buying tickets minutes before we left, I took more than 50 people to Brighton by train for just over £100!
In London, with more than ten of you, you’ll be able to get group discount tickets for some theatre shows. It depends which ones you want to see though - some of the most popular aren’t doing any special deals at all.
Personally, I detest the London Eye. It’s a picturesque addition to the London skyline, but up to 3 hours queing for the privelege of seeing the same things you can see from any tower block isn’t worth the money, IMO (and that is how long you’ll be queuing in the school holidays) There is also absolutely nothing to do while you queue - and you have to all queue, no place-saving. I’m surprised they don’t have Covent-Garden style licensed buskers or something.
For travel, with that many kids, get a Family Travelcard each day.
Perhaps, when you leave London, you could consider getting the train up to, say, York, staying there for a night or two, and then carry on up to Scotland? York is on the route to Edinburgh anyway. I’ve never been there, so can’t comment, but it sounds nice.
One thing to miss in Scotland is ‘the Highland Games.’ What they actually seem to be is small school fetes with a few local men running races and tossing cabers. It’s not one big Highland Games event, it’s lots of little local games. Loch Ness is lovely but is a bit further away than the other lochs, of which I’d recommend Loch Lomond - so big that it actually has tides.
Bear in mind that Scotland is colder than England. While you won’t need jumpers in England in Summer, you might at exactly the same time in Scotland.
Enjoy your trip!