Its not the twinport one. Some guy asked him on the thread and he says he's sure its not the twinport. Its from a 53 plate corsa active. He also says:
"
68k pal
but starts first time, running sweet as a nut, no problems and well looked after 
oil regulaly changed and checked...not been thrashed around either, as like to keep the mpg good lol "
If you want ill PM him and get a contact number/email? You need to register on corsa-c.co.uk to see the ad.........