Spider wrote:

I already have a big water tank going spare, so I'll probably use that.
I had to smile when I read 'fire station' ... my father was a fireman,
so he would have been highly amused:~). If the tank doesn't work, I may
play the fireman's daughter card at the local fire station.

A local-ish fireman sells them for a tenner a time.

Best of luck with your trump card.

--
Rusty