Never heard of it. [looks it up] I’d say “miles ahead”. Don’t they have miles in the UK? 
I’ve never heard it used this way but it would have been obvious to me from context alone.
That is my experience, too. For a while the term ‘trump’ seems to have become a bit more common down south, but the young people now all seem to speak Multicultural London English, so they probably have a different term these days for farting.
For the purposes of your FQ, you are quite right to isolate the date period like this, but it’s probably worth mentioning that Trump was not really well known to the UK public, probably right up to some time in the 2000s or so, when the US version of The Apprentice made it to our screens.
We sure do. And buy our petrol (gas) in litres. Go figure.
Just to say that references to being in the south or being up north in this thread required me to parse a number of these posts a bit more carefully than usual, since in the US, The North and The South are two distinctly American identities. I have never heard that terminology used with reference to England. Thank you. SDMB continues to fight ignorance!
I’m familar with trump meaning a toot. I think of it as the slow expulsion of gas.
A Fart is quick and loud.
John is a slang term for toilet and it’s a proper Noun. There’s no confusion in using the word.
I still use toot or trump as a bodily function.
That would be these guys, I think.
You’re right - in the case in point of this thread, I never encountered the word ‘trump’ as fart, growing up in the South of England, then I did encounter it a lot when I travelled to the North, however, this wasn’t just a geographic journey, I was also moving out of a familiar social circle into an unfamiliar one. Without also travelling to other places not in the north, I have no way to know if the same thing might have happened there. Hasty generalisation I suppose.
Two distinct identities in England as well - though with a different kind of definition. South = moneyed, professional classes, London-centric; North = industrial and less well off. Broad brush and a bit out of date, but you get the gist. Safe to say they look down on each other. I can say this as I’m from the Midlands and live in the South West (which doesn’t count), so am more of a casual observer.
Probably worth noting that Scotland has its own sense of ‘down south’ too - which means places like Ayr and Dumfries, which are north of most* of England’s ‘up north’
*The border between Scotland and England runs diagonally SW to NE, so there are parts of the north of England that are further north than parts of the south of Scotland.