Cockney rhyming slang.
Bristol Cities = Titties.
It’s rhyming slang most likely: Bristol ->Bristol City (one of the two main Bristol football teams) -> Titty. I can’t say I’ve ever heard it in the wild, but the Benny Hill Show was feckin decades ago, so who knows.
Edit: Beaten several times goddammit
Mr. Pither’s North Cornwall cycling itinerary:
Bovey Tracey
Budleigh Salterton
the B489
Dawlish Road
Ottery St. Mary
Tiverton
Iddesleigh
Bude
North Cornwall District Hospital
Taunton
A397 Ilfracombe Rd.
- suddenly the tour veers off into the south of France (after hooking up with Terry Jones as Clodagh Rogers)…
Alpes region (I’m guessing that’s Rhone-Alpes) - and now, Russia…
Smolensk British Embassy
Smolensk Young Men’s Anti-Christian Association (YMACA)
Russian prison - after Pither and Clodagh escape the Russian execution squad, they end up back in…
Cornish country lane, with his final destination on a nearby sign saying “Tavistock 12 miles”.
Wow…what did Cornwall do in a previous life?
ETA: Much enjoyed the frequent “fell off in…” qualifier.
“It’s like riding a bicycle. You never forget how to fall off.”
nm
Just think of them as the UK equivalent to Boise, Idaho.
And Rutland, which is known mainly for being a county with a very small area for no obvious reason (there’s no massive, dense city), like the US state of Rhode Island.
Hence, the fake Rutland Television (at a time when there were only three TV networks for the whole country) —> The Rutles.
Oh, and maybe it was never mentioned by Monty Python, but I was always told that the closest UK equivalent to “New Jersey” is Wigan, a small rust-belt city between Liverpool and Manchester.
I had a similar experience with Binghamton growing up in New York State. There were mile signs for it all along the New York highways: if a third city was mentioned on a mileage sign it would be Binghamton, sometimes at 200+ miles away, so I imagined it was some huge/medium destination city like Buffalo. But it’s only around the size of Swindon. I think in Binghamton’s case it was because it was the biggest city on the Southern Tier and the intersection of several big roads.
One of the reasons I went to Britain in the '70s was to visit Potterton, outside of Barwick-in-Elmut (about 7 miles east of Leeds, Yorkshire), from which my mother’s family had emigrated in the 17th century.
I found B-in-E and started walking down a road with a sign that said “Potterton 1 1/2 miles.” About an hour later, I came across a sign pointing in the opposite direction that said “Potterton 2 1/2 miles.”
There may have been a village there once, but 40 years ago there was nothing but a crossroads that I walked through without even noticing!*
*All was not lost, however: I knocked on the door of a nearby manor house to ask directions and was invited in for supper. I ended up staying with the owners (an elderly woman and her grown son) for the next three days! 
“Boise, Cotton? Why, that might not be a bad place!”
I watched an episode of Michael Palin’s old Ripping Yarns last night: “Golden Gorden”. The place name (and his son’s first name) was “Barnstoneworth”. Some effort seems have been used to suitably mangle the name in a proper British fashion.
It appears the name was chosen to mock similarly named, awkward to pronounce towns.
(And in the spirit of Toad The Wet Sprocket and such, there is now a Barnstoneworth United Football Club, but in Australia.)
I’ve cycled that area many times, Potterton did have a population right up to mid Victorian, but now its just a farmhouse. There are a couple of good off road routes in the area that take you to the Bramham park estate.
I must say, I am surprised to encounter anyone on a US message board who might have even heard of the place, its pretty obscure even around here
That reminds me of a Flanders and Swann joke I only just got recently:
“Of course, it doesn’t matter where you live south of the river now, because under the New London Plan they’re lumping all those [neighborhoods] together… they’re gonna call them ‘Brighton’”.
Where Brighton is actually a resort town on the south coast of England, quite different from any part of London… 
One of my college roommates had a bunch of issues of “Viz” magazine, and I remember one Roger Mellie cartoon where he was proposing a new TV show called “The Bristol Maze” where a blindfolded contestant would have to feel his way through a maze of topless women.
It was years later before I realised that (a) Bristol = tits and (b) there was a British game show called The Crystal Maze.
I call north NJ all too much. Stealing it.
Contender for greatest TV episode ever.
Besides produce my wife’s relatives who didn’t always speak English?
From somewhat Asian-y head of British Consulate (Chapman):
“Coronwor-wor-oh…Ah yes know Coronworl very well. Went to school there, Mother and Father live there, ah yes, have lots of friends there. Go for weekend parties and polo playing cards and bridge in evening. Oh yes belong to many clubs in Coro-or-onworld.”
In Python’s “Blackmail” sketch, Bromsgrove and Thames Ditton feel the love.
Well ya can’t drive there either because the highways are jammed with broken heroes.
It’s not just Monty Python : *You, Me, and the Apocalypse *was set partly in Slough, which I gather is a suburb of London.
Slough is also where the British version of The Office takes place.
And how can we forget Coventry - to be more specific, Coventry City FC? (BTW, Coventry City finally won a Cup final, in 1987 - IIRC, the first, and presumably only so far, FA Cup final where the winning goal was an own goal - but it wasn’t all good news as the automatic entry into a UEFA tournament that normally goes with it was withdrawn because all England teams were in the middle of a ban from European tournaments after the incident between Liverpool and Juventus fans at the 1985 European Cup (predecessor to the Champions League) final.)
Slough isn’t really a suburb of London (at least very few people in London or Slough would describe it as such), rather a mid-sized town in Berkshire very close to London. That said there is literally only a few hundred metres of countryside these days between Slough’s most eastern suburb and the suburban/urban sprawl of Greater London that starts at Heathrow.
Slough has a reputation of being dull industrial and later commerical satellite of London, not as rich as its neighbours, both economically and culturally. In 1937 Sir John Betjeman wrote what the famous poem Slough, which opened with:
I live in Berkshire myself and a lot of people in the county jokingly pronounce “Slough” to rhyme with “cough” as in “the Slough of Despond”. Slough itself isn’t that bad, but it’s the kind of place you wouldn’t go to unless you have a specific reason to, especially as there are plenty of other nicer places nearby. Slough’s most famous landmark is the “Magic Roundabout”, a roundabout surrounded by several mini-roundabouts. Ricky Gervais (who is from Berkshire) choose it as the setting for his sitcom The Office (the original UK series), because of its reputation for being boring and nondescript.