bloody cranesbill 'Belle of Herterton'

'Belle of Herterton' is a rhizomatous, clump-forming herbaceous perennial, up to 25cm high, with deciduous, deeply cut, five-lobed or seven-lobed, mid-green leaves, 5-10cm across, and soft pink flowers, up to 4cm across, which become paler with age, from early to late summer and occasionally on to autumn