Is this Petty Spurge or Sun Spurge? Churchyard Survey
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.. Euphorbia helioscopa, has umbels that are usually 5-fayed, with a clearly visible rosette of umbel bracts which are obovate - egg-shaped.
Petty Spurge, E. peplus, is usually only 3-rayed (ie three stems above the rosette of bracts) and those bracts are more triangular than oval.
I can't tell from your photos which this is likely to be, but I hope that the ID pointer above is of use, next time!
Oh, and of course petty spurge is "a smaller version" of sun spurge, but don't you find that descriptions like that are useless unless you have two healthy, typical specimens, one of each, side by side? *laughs*
How to take close-ups with cheap phone and hand-lens:
Field Guides for Budding Botanists:
That's really helpful, thanks, Rachy - I've learned something there and I'll have a good look next time I'm at the churchyard.
Glad that you are more intelligent that my fingers are, Steve, you realised that I meant 5-rayed there.....
You're welcome, anyway.
Lat/Lng: 50.6876, -1.5327
OS grid ref: SZ331876