It has hints of several plants: Liriope, Muscari, Galanthus (snowdrop), or one of the narrow-leaved irises such as I. reticulata. I lean towards the latter.
Any other clues?
...Primarily, do you remember what flowers occur there (any time of year).
The other greenery...
...seems to be at least two plants: the one with divided leaves could be a Geum, the one with simple opposite leaves I'm not sure about (hints of dog's mercury).
Let's see if Jen offers some insight!...
Thanks Mike :-)
I agree with Iris reticulata as the most likely suspect for the thin greyish leaves - Allium would have a degree of oniony odour when crushed but flowers would be the deciding factor. There are some grasses with quite thick long greyish leaves similar to this but Iris fits better I think...
I have annotated the pic with arrows -
Red = Enchanters nightshade - Circaea lutetiana - a member of the willowherb and evening primrose family Onagraceae.
Blue = Herb bennet also known as Wood Avens - Geum urbanum
Yellow = Epilobium sp - possibly montanum, the broad-leaved willowherb.
White = My best guess for this silvery leaved plant is one of the wormwoods, Artemsia sp. but most likely a garden variety not a UK native, if it is it will be strongly aromatic when crushed.
Hope that all helps!