Rob wrote:

Do you happen to recall where you got that? The longest 25mm SDS bits
I've seen are only 450mm long and more like £35 a go.

It was about 18 months ago, and from one of three local hardware
shops - but I can't tell you which one.

Screwfix do an SDS 1000x16mm for £20:
http://www.screwfix.com/app/sfd/cat/...90403&id=10150

Or a 1000x22mm for £39:
http://www.screwfix.com/app/sfd/cat/...90403&id=10252

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Grunff