I think it is a bit early in the project to say that the Temple Farm Development is running into problems with asbestos removal. The WTS was fully aware that it is a contaminated site and I would suspect that they are following regulations in how to handle the contamination.
According to the Temple Farm Phasing Plan, it will be a five year project.
Temple Farm Development website:
http://www.templefarmdevelopment.co.uk/
Oh...and by the way...there was a thread on here a while back where someone was getting all excited because the site was restricted for a while and there were excavations going on. If you read the phasing plan, you will discover that those activities were part of an archaeological survey to see if there was anything historically important beneath the surface before proceeding with the project.