Identification please

johnlindop

Can anyone identify what this is please. Grew by itself and I left it to see how it developed.

Dovefromabove

Euphorbia lathyris aka caper spurge.

Be careful when handling it as the milky sap can burn the skin, particularly in bright sunlight ... and keep it away from your eyes. 

johnlindop

Many thanks. Think I will carefully remove it!!