That's unlikely. Otherwise he would have stated 'get some concrete mix, in order to lay some footings upon which I will build an extension (subject to council approval)'. Plus they would never get any work done anyway with Wilko Johnson waving that guitar around like a madman; a potential H&S nightmare.
I don't think it's asking too much of our 70's R&B combos to have sensible building advice - do you?
Tell that to Starship - they built a city on rock n roll, what kind of building regs were they working to ?