London is a busy city and I love it for that! But I realised that many tourists get stressed very soon in this 5-6 million melting pot. Of course, the traffic is different than in the rural areas of England and nor everybody is used to the left traffic version either. So when coming to London, people have to sit back and relax - that's my opinion. I had to learn it too, but I got round the traffic with the reliable BlackLane Limousine Service which is a good alternative to other means of public transport. I think it is a proper place to put it here. Hope it helps!
This service sound like a good alternative. Traffic from the left landed a friend of ours in a London hospital on his first day of visit as he looked right to cross the street and stept right into oncoming traffic coming from the left. Yes, it takes a little time to get used to London traffic.