Our driver/tour leader/friend/history teacher etc etc, Steve Deniro was amazing! I am in London quite often for work (from CT in the US), but for this trip came along with my wife and my eldest daughter to celebrate her 18th birthday. What an amazing four hours we had. Cathedrals off the beaten path, historic pubs, unique views/vistas of the premier tourist destinations (Big Ben, Parliament, Westminster Abbey, Buckingham Palace)...and all of it done with cheer, insight, humor and efficiency. I cannot speak highly enough of Steve or of the content of our 4 hours. The attached photos do not do it justice....but look at the smiles.
Clearly there are many ways to see the city, but I HIGHLY recommend starting this way and then going back to double down on walking the places you want to spend a lot more time with....and if at all possible, ask for Steve Deniro by name....he is in the last photo attached.