I loved the programme & wish too they'd do a catch up.
Can't find anyhting about a come back - but here is a list of some of the characters I found. You've mentioned some of them but others may jog your memory!
TEN CHARACTERS WHO STARRED IN BBC1 DOCUSOAP PADDINGTON GREEN
1 transsexual prostitute and wannabe pianist Jackie McAuliffe
2 creepy wig shop owner Harry Gilbert
3 Claude and Claudia from the scooter shop
4 locksmith Jason Osbourne and his posh, neglected girlfriend
5 stressed car park boss Dave Chambers
6 camp estate agent Neil Manning
7 the desperate-for-cash Camilla Arthur, who dabbled in work as a casting director and DJ
8 chirpy bus conductor Donovan �Danny' Green
9 teenage model Kelly from Yorkshire
10 cabbie Helen and her six-year-old twins
Also have a look here for a memory jog....
http://www.jackiemcauliffe.net/pgreen.html