Several points, ninecrow. Firstly, were you asking for a suggested species or for a plant? If the latter it's not done on here to ask for stuff and since most posters are in the USA you'd have trouble getting anything offered.

Secondly, I don't think any Passifloras would survive life on an English windowsill. Too dark and too little space. You'd need a greenhouse or conservatory.

Lastly, Passiflora caerulea is perfectly hardy here and you could grow it outside in the garden.

Passiflora coriacea makes a good little houseplant; its flowers are not very colorful, but the foliage is nicely spotted.

Was just asking for Ideas Not for Plants Floral that's All

OK, I understand now.

RHS gives a single supplier of P coriacea in the U.K.