I lived in Ramsgate till 18 so Broadstairs, Margate, Sandwich Minnis Bay and Deal were my beaches. DH is from Dorset so Studland, Bournemouth and Weymouth are favourites.
One daughter lived on Anglesey for several years, now in Bangor, so Newborough and Trearrdur Bay on Anglesey were close by.
Finally several holidays were spent near Crackington Haven in N Cornwall, but I see today that it is closed for swimming due to oil or fuel pollution.
I would love to visit some of the beaches mentioned and will make a list of them. I love the seaside. Winter and summer.