"JennyC" wrote:

Might be easier to preserve in glass? My mum used to do this to great
effect

That's what I meant, not actual tins. 'Canning' is the American term for
it, even in glass, and there's many US sites selling every conceivable
preserving aid or utensil but very few here in the UK as far as I can
see.

Thanks for the links.

Brian Mitchell