The SDLP also criticised the DUP and Wrightbus for the stunt.
Its spokesman on regional development John Dallat MLA said: "This demonstrates an arrogance and complete contempt for the rules by the DUP.
"Transport for London has since stated it would have flat-out refused the DUP on the most basic grounds that it is a Statefunded company and this was a party political event.
"It is highly suspect that a company that has received millions from INVESTNI and great support from DETI headed by the DUP's [Ecomony Minister] Arlene Foster should facilitate such rule-breaking this way.
"They must also make explicit whether they paid for the use of Wrightbus's premises or if this will be considered a donation to their campaign." A DUP spokesman said last night: "Wrightbus is an excellent example of Northern I r e l a n d engineering success.
In fact, in June 1998 the level of leaks to the DUP became so bad that Mo Mowlam was forced to start an investigation.
Just what the DUP needed in its ranks - another political dinosaur.
Sir Reg Empey UUP; Robin Newton DUP; David Ervine PUP; Naomi Long All; Michael Copeland UUPMP Peter Robinson won 9,254 first preference votes and helped bring a second DUP seat.
Closest to the finishing line are Mark Robinson of the DUP, and the SDLP's Carmel Hanna and Alisdair McDonell.
Ex-UUP man Peter Weir managed 3,675 votes, boosting the DUP's chances in the area.
Elected: Jim Wells DUPTHE DUP's Jim Wells took 6,789 first preference votes to secure his seat at the count in Dromore.