I have seen it and i think its very funny

You are Welsh see girl, is'nt it, look you.
The location for much of the filming was in Swansea and surrounds, and whilst many thought it to be hilarious (including moi), it apparently ruffled a few feathers in this fair city.
Fatty Lewis, Greyo etc etc - excellent stuff 
Come to think of it, Greyo was a regular passenger on my train.
Haven't seen him in a while now though!
Greyo, Real name DORIEN THOMAS.
That's the fella 
I never knew until a few months ago that the guy who played Mr Mort, who was waiting in the car with the twins whilst his wife was in the doctors getting the tamazepam was no other than Ronnie Williams, of Ryan & Ronnie fame, sadly, he will not be in the sequel as he committed suicide a couple of years ago.

Spot on Di, that scene was actually filmed under the M4 elevated section near Pentyla, Port Talbot.
I've also heard that there's a sequel in the offing.

Twin Town Sequel
The director of cult 1990s black comedy Twin Town is aiming to reunite some of the cast for a follow-up he is writing. Directed by Kevin Allen it starred Rhys Ifans, his real life brother Llyr and a host of Welsh character actors.
Allen, who grew up in Swansea, said he felt the time was right to revisit some of the characters and the city.
"I would say it's a follow-up. It's Swansea 12 years on," he said.
"I've changed and the city has changed - the landscape has changed a lot. It seems like the right time."
He said he had spoken to the Ifans brothers and they were keen to revisit their roles.
"Bringing the twins back is the obvious continuum. They are both well up for it."
He said he and his writing partner Paul Durden had yet to sit down and start the script but he had some ideas of where he wanted the characters to go.
"We have the money to write it and then we'll go and make it," he added.
The Lewis Bros, as played by the Ifans Bros, closed out the first film by heading off to Morocco and, apparently, the sequel concept has them returning as Muslim fundamentalists. It has the working title of Fatty Al Akbar, a pun on the Arabic takbir ‘Allahu Akbar’, meaning God is Great.
A script for the sequel is to be written in 2010, and has a estimated release date for sometime in 2011.
So, yes, it looks like there WILL be a sequel out next year. Can't wait personally, but usually sequels are never up to the originals standard.