22-spot Ladybirds. The second photograph is a separate individual, on the same plant at the same time.
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for ladybird identification try installing the smart phone app irecord Ladybirds. Its developed by university of bristol and records are submitted to the UK ladybird survey and biological records centre
Th app features useful gallery of pictures for ech species, ID tips and a handy main body colour id shortcut.
Its free to down load.
I've noticed the yellow and white heads, too. I do hope that it turns out to be a way of distinguishing males and females. Somehow, I find it more interesting if I know whether the beetle I am looking at a he or a she, that it doesn't stay just an "it".
Lat/Lng: 51.315875, -0.76002
OS grid ref: SU865581