I'm pretty sure you've got firethorn/pyracantha Pyracantha angustifolia, although the leaves in your photos are thinner and more pointed than in my reference books, so it might be a different species or cultivar. Having said that some cotoneasters also look a bit like pyracantha.
I've googled this and it does, to my untrained eye, look like pyracantha. Thanks for helping with this, I really should know what I'm taking photos of.
I'm still not convinced by the pointed and smooth edges to the leaves in your photo. If you can check the plant again, if it has spines/thorns on the stems it's a pyracantha if not then it's a cotoneaster, possibly Cotoneaster frigidus 'Cornubia' which seems to have a closer leaf shape to your photo - https://www.google.co.uk/search?q=co...w=1489&bih=946
Sorry for any confusion. But if you look at images for both plants, you'll see how similar they look.