[Goosegirl]

I've just noticed this growing amongst a small grass plant. Is it Cardamine praetensiss also called Lady's Smock?

[mumofstig]

When was photo taken? Now is wrong flowering time for lady's smock 

[sunshineband]

The top of the flower spike doesn't look right for Lady's Smock either (apart from the flowering time as MoS has already said of course)

[Goosegirl]

I've just taken it today but seen a white flower there this last week.

[mumofstig]

I can't make it out from the picture, sorry, how many petals do the flowers have?

[mumofstig]

Something about it reminds me of Polianthes tuberosa or a Schizostylis - what a puzzle 

[Aunt Sally]

Is it a lily?

[Comfreypatch]

Is it a penstemon

[Goosegirl]

Flower pic a bit blurred as it is a bit windy here today. The actual flowers look like little snapdragons with a pale yellow centre. The other pic shows the leaves which are quite thin and you can see one of its stems lying on the ground.  Ignore the yellow Schizostylis flower.

[New shoot]

Linaria    Can't see the backs of the flowers clearly enough to see if they come down to a spike at the back, but they look close and the leaves are right.

[Goosegirl]

They do have a spike at the back of the flower so it is Linaria. Wonder where it came from - probably a bird, but will save the seed to grow next year. Thanks all.