Looking at 1976 there were five 35C days in total, but not consecutive (June 26, 27, 28, then July 2 and 3).
August 1990 also had three consecutive 35C+ days (August 2, 3, 4).
August 2003 only managed two consecutive days (Aug 9 and 10, and it was also reached on Aug 6).
In fact before 1976 35C had only been reached 7 times in total all century!
Yateley, NE Hampshire, 73m asl
"But who wants to be foretold the weather? It is bad enough when it comes, without our having the misery of knowing about it beforehand." — Jerome K. Jerome