It is a Cotoneaster, maybe C. simonsii or similar. Have a look around and you will probably see the errant parent.

Thanks vincent, I will see if it develops as expected (I have checked pictures etc on Internet).

Fred

Cotoneasters do self seed in unexpected places - birds eat the berries and the grand master plan for cotoneaster to spread takes off :-)

Thanks Beattie, as it was said in Jurrasic Park, "Life finds a way!!"

Fred