Yep, all those beers are completely on the nail - they all exist and most have had amusing advertising campaigns as well.
For example, "Spitfire" ale is brewed in the south east of England in Kent where a lot of the Battle of Britain in WWII was fought over. The brewery got into awful trouble as their poster campaign on the London subway offended tourists as it said "Spitfire - downed all over the south of England, just like the Luftwaffe" or "Spitfire - no Fokker comes close"
"Scruttocks Old Dirigible is from east Kent and is a micro brewery beer so many Brits probably havnt heard of it - the slogan is great though keeping in mind that 'dirigible' is the proper name for airships/blimps/zeppelins - the slogan goes along the lines of the amount of hot air you generate if you drink the beer
and as for Tollemache Love Pump, I own a beer mat that has their 'Lick My' slogan on it!!
Dogscoff is on the level - Cripple Cock is a cider made in the south west of England - I personally query whether Mr Scoff could get to 8-9 pints as I would only attempt this if (a) Mrs GT agreed and accepted the consequences and (b) I ties myself to a large rock first!