One of my favourite occupations!
They form a low bush, and this particular one, Rosa mundi 'Versicolour' has dark pink striped petals.
Like all roses, you get the best from them if you dead-head them as soon as the flowers start to fade. Oh, except for Rosa rugosa, that rough tough hedging rose, which forms wonderful fat red tomato-like hips in autumn. That one, you don't dead head. Most others, you do.
With Rosa mundi, there is an additional reason for deadheading - the petals are large and remarkably resilient, so if falling petals are dampened by dew or rain, they can easily wrap themselves around adjacent buds, preventing them from opening.
So once a week I go round with the secateurs, carefully removing any fading flowers.
It tidies up the whole plant, and reduces the carpet of soggy and browning petals that you otherwise get on the grass below.
And could the petals not be used for pot-pourri, you ask? No - for that, you need to take the petals before the flower is fully opened, so these tired old ones just wouldn't be any good - not to mention the fact that many of them have already gone brown. Nope - it's the bonfire heap for them.