Cosworth says it isn't concerned by rumours about the stability of some of the new teams on the F1 grid, with the head of its F1 business arm Mark Gallagher insisting the company say 'nothing but positive' things to say about the three outfits.

F1 supremo Bernie Ecclestone had suggested that at least one of the newcomers - Hispania, Virgin and Lotus - wouldn't make it to the end of 2010 without help, stating in Monaco that Hispania for one 'had problems'.

Hispania bosses, and Virgin chief Richard Branson, have since denied any financial worries and Gallagher insisted that Cosworth wasn't in anyway concerned about the future.

"From a Cosworth perspective all three new teams work hard and are good commercial as well as technical partners," he was quoted by ITV-F1. "I think we are in a better position than most to comment on their condition and what we see is nothing but positive.

"There has been something of a tendency to find fault or criticism with the new teams wherever possible and I think this criticism is quite unjust. If you talk to the new teams directly, witness the determination of their respective managements, and indeed look at their cumulative success to date in fielding three teams in 2010 in the midst of some of the most difficult economic circumstances imaginable, you would get a different and rather more balanced view."