Could be a sad Lysimachia 'Firecracker'- likes dampish soil and dappled sun. If it flowers and they're yellow, that's what it is.

Thanks Bamboo - I just had to rescue it, limp and wrapped up in a bit of newspaper, hardly any soil on it at all. The dappled shade will be easy - damp soil, I'm not so sure. We shall see...

Yes I agree as it looks like mine, trouble is it spreads and spreads and spreads.

and spreads and spread. And Weedkiller has little effect on it.

Ah - well in that case, I might withdraw my pity and get rid while I can! Just as well the fair was in aid of a good cause!!

I thought I had got rid last year but its reshooted in 3 places.

I try to lose some every year - back it comes! :-((

You have been warned, Melchisedec....

Oh dear, I planted one last autumn because the leaves were such a pretty colour. Better keep an eye on it!

Almost picked this up at the GC today - thank goodness I didn't :)

It's a real thug! :-((

if you like it put it in a pot and then plant the pot [like you do for mint!] it wont stop it permanently but it will slow it down a bit.

Good thinking, Sbg. :-)) Too late for me, though! I inherited mine.

Good idea.

Thank you all for your timely warnings - it is already in the green bin!

Shame as it is so pretty, but thats the best place for MD.

Yes - it is a shame. I hate to throw away a plant, even just a small twig of one, but I think it was probably for the best! Thanks again for all the advice.