Certainly! Here is the translation into UK English, following your instructions:

---
Origin
Berberis darwinii 'Compacta' belongs to the Berberidaceae family. This compact cultivar originates from South America, specifically the southern regions of Chile and Argentina. The plant is named after Charles Darwin, who discovered the species during his voyage on the HMS Beagle.

Characteristics
Berberis darwinii 'Compacta' is an evergreen shrub with a compact and dense growth habit. The plant usually reaches about 1 metre in height and width. Its leaves are small, dark green and leathery, with spiny edges. In spring, it produces orange-yellow, clustered flowers. After flowering, small, blue-black berries appear.

Care
Berberis darwinii 'Compacta' grows best in well-drained soil. The plant tolerates both sun and partial shade. Pruning can be carried out to maintain its shape. This shrub is hardy and resistant to sea wind. Regular watering is especially required during dry periods.