Definitely NOT 1936. Ballpark a quarter of a century later, I'd say. The player tokens in the set, such as the bulldozer, are a big clue.
I know - as I said, the player tokens place it between the early 1950s and early 1960s (as well as the obvious fact the stations are labelled as British Railways).
Here's a brief timeline of the tokens that were used in the Waddingtons and later Hasbro UK sets:
1936 - cast pewter tokens (thimble, top hat, boot, vintage sports car, flat iron, dreadnought battleship) based on those used in the US Parker Brothers sets. 21 shilling 'Super Gold' set had the same battleship, boot and thimble with the rest replaced by a lamppost, tramcar, lantern, bathtub and a more detailed sports car, and the wooden property pieces replaced by bakelite versions. 42 shilling Deluxe Edition had the same bakelite property pieces and tokens, with the addition of an elephant.
1942 - standard 6 tokens replaced by flat colour-printed card that slotted into black wooden bases (with a rocking horse replacing the thimble) due to metal rationing. Dreadnought becomes a modern battleship (other wartime economy measures were the property pieces were made from lower quality wood and painted flat black, the banknotes used lower quality white paper with single sided printing, and the wooden dice were replaced by a card spinner). Super Gold and Deluxe editions dropped.
1943 - tokens briefly substituted by painted turned wood 'pawns' from Waddington's '64 Milestones' game as a further economy measure (presumably that game was not selling and they had some left over).
1944 - card and wood tokens returned.
1948 - stations changed from LNER to British Railways. Wooden bases on tokens now painted to match the printed card. Property pieces returned to their original colours and wood quality and wooden dice return.
1954 - card and wood tokens replaced by painted flat cast metal (tank, locomotive, tractor, motorcycle, car, galleon)
1957 - red with white stripe 'long box' packaging introduced.
1961 - flat metal tokens are replaced with 'modernised' 3D cast metal (originally tin/lead alloy, later pewter) based on the original tokens - flat iron, boot , top hat, luxury yacht, sports car (based on the Jaguar E type coupe) but with the scottie dog replacing the thimble. Wooden property pieces replaced with injection-moulded plastic.
1993 - 'modernised' sports car and yacht tokens replaced with versions resembling the original 1936 castings (i.e. vintage sports car and dreadnought battleship).
1996 - thimble returns, with the addition of WWI howitzer, leaping horse and rider and wheelbarrow tokens (it was now advertised as an 8 player game instead of 6 players). This was the first edition produced after the Hasbro takeover in 1994, and these new tokens were based on those in the original US Parker Brothers sets.
2008 - howitzer and horse and rider dropped.
2013 - iron replaced by a cat after a public vote
2017 - thimble, boot and wheelbarrow replaced by a T-Rex, rubber duck and Penguin after a public vote.