Whoa Pandora, that is almost as long as I need.
45 miles to LHR from a Northerly direction of which only 1- 1.5 miles is not at least a dual cow-which-weigh
leaving
before 0600...40-45 mins
0630 -0700....1hr -1:15
0700-0830.....1:45 - 2:15
0830-0915.....1:15-1:30
0915-1600....55 mins
1600-1800...1:10
1800-onwards...45 mins
On the return, so long as I don't leave between 3pm and 7pm it generally takes 1hr to 1:10.
only 3 (three) sets of traffic lights
no speed cameras (that I know of) except for the variable speed limit part of the M25.
Cheaper house prices and my other half only need to drive 15 mins to work.
But LHR being LHR I usually allow 30 mins from brakes on to driving out of the car park (includes usual 5 mins of 'where did I park the damn car')