To be fair, I think that you can get away with not wearing a tie if you must nowadays.
When I first started work, it was as a Duty Clerk/Management trainee with a large Spirits company.This circa 1973. 1800 quid per annum, and that was a pretty good salary. We had to wear full suit, three piece.
The office manager, a particular type of creature, ruled the office like a Sergeant Major. Every afternoon, he used to go through to the Managing Directors office, come back, and state that the Managing Director had decreed it was warm, and we may loosen our ties
Oh my God how times have changed............
For the worse I reckon, never did any of us any harm, binned the suits a while ago though, Ghengis