Found this in are back garden in Suffolk, UK.

Can anyone tell us what it is? OUr best guess is that it's the larvae of something....

Thanks.

Post's pictures

Insect.jpg, 393.29 kb, 1024 x 685

I think it is a beetle larva.

I certainly can't ID to species or even genus but I would hazard a semi-educated guess that this is a rove beetle (which is the Staphylinidae family). This  family includes the relatively well known "devils coach horse" but there are quite a lot of rove beetles in the UK too.

Indeed i agree to beetle larvae, i'm not up on those, but point you also to carabid beetles - family Carabidae (i.e. ground beetles) also. Would be a helpful garden guest - a predator of other inverts that may be considered pests.