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It's the Environemtnal Health Officer's job to deal with this - HSE will get involved if the works are notifiable - i.e,. you're above a certain threshold of some sort and have to tell them you're dealing with asbestos (this is from vague memory of a asbestos awareness training i did a while ago). Basically, take some pics, send it to the EHO and tell them if they're still doing it. They'll come down and check whether they think it's asbestos and if it is, they have some level of power to compel the builder to do it properly and can involve HSE if needed.
I did that they referred me to local authority