Tell me about it mate. I'm a long term freelancer for a developer - all our sites have been closed down and I've been stood down. No furloughing for me as I'm self employed and I fall right through the cracks in the Government's self employed assistance plan that's due to kick in, in June, so I'm ****ed.
You are correct about suppliers, also subcontractors - the majority have shut up shop. If you can't get the materials and labour you can't build regardless of whether the Government permits you to or not.