Pam Moore wrote:
...
In our limy water area rain water is preciousand I live in a terraced
house with no downpipe on my building!


That shouldn't be too difficult a task for someone with a ladder and a
drill - you neighbours will probably welcome your initiative as they'll then
have less water to dispose of. I lived in a row once where the end terraces
just couldn't cope with the volume.

--
William Tasso