Thank you for your enquiry. I am the Secretary of the London Branch of the Coastal Forces Veterans Association. I do not know whether any of our members know your grandfather or MGB 661, but I can ask at our next meeting in October. As we are the only Branch still meeting, we would love to contact your grandfather, if he can get to London he would be most welcome to join us on HMS Belfast. Otherwise, we keep in touch with members (all over the country) by e-mail, newsletter etc. If you could contact me on firstname.lastname@example.org
we could arrange something.