My family and I will be in London in May staying at the Intercontinental near the Hyde Park Corner tube. My English in-laws will be coming in from Kent for an early dinner on a Saturday night. The dinner is the night before we leave London very early the next morning so it needs to be as close to the hotel/convenient as possible. I've searched the boards and can't find anything withing 1/2 mile. We were trying to avoid taxis just to keep it simple. Any reasonably priced ideas?