The plant I know of which has tubers in strings like that is Crocosmia.

Thank you, looks very close to it!!

Crocosmia/Montbretia gets my vote.

and mine too.

snap

I agree with monbretia. Are you planning to put it back or at least the top corm or is it a rogue left from previous clearance. I have tried to clear page area of invasive monbretia but think I will be finding babies for a few years yet.

It might be a nice cultivar rather than the bog standard montbretia though?

I agree MY "common" montbretia bulbs are much smaller and really spread, trying to get rid of them the leaves always seam to go brown quickly.

Many thanks to all that replied.
I shall probably replant some and pass some on.