Associate
In my case I just pointed the roofer at the estate agent (who had a key) and they worked it out themselves, did take a week or so but if your searches haven't started yet then that's not a problem.
Ah I hadnt considered the estate agent dealing with the roofer.
I emailed the EA anyway this morning saying that I need the seller to be available at some point for roofers coming around. Also said that as it is external work I could meet them there myself if the seller wasnt available.
Ideally I want the seller to hear from a professional that the work needs doing.