@416ef617 My host has stopped using Lets Encrypt. Anyway, I tried that and I couldn't work out how to set it up... I have decided I have to pursue SSL certificates via my host and ask them to set it up. But it's so expensive. And between now and April they are moving ALL the data to a new server anyway, so I might limp onwards until then and get a different package with SSL included. Here's hoping. 

 @416ef617 I forget. I think you have to pay them to do it, but my hosting company won't work with them any more anyway.