I just found this information and as long as they stay in the garden it seem to be alright.
!”Cotoneaster. Many of the species of cotoneaster available in garden centres are highly invasive – some so much so that it is now illegal to plant them in the countryside or to allow them to ‘escape’ from your garden! If you’d like to attract birds to your garden with berries, better alternatives include: Hawthorn.”
https://www.rspb.org.uk › advice
Invasive Shrubs to be Aware of in Your Garden – The RSPB