Over the years I have found that in London the tourist season starts more or less at the time of the ideal home Show in Earls Court.  The show is on for about 3 weeks and finishes near Easter, which is when the tourists pick up a bit, then the week after easter is European holidays when the season really kicks in.  Flight prices from Heathrow normally get a bit more expensive as well.  Even though the main tourist visiting times are in July and August.  There are various events, such as Wimbledon tennis, this years twenty20 cricket world cup and flower shows etc going on for most of the year.  If you are travelling to London don’t forget to check our prices and availability at The Cottage Guest House, we are near Heathrow and hope you will be our guest.  Our phone number is +44(0)2088971815.