Nick, thank you so much for your reply and offer of new seals. I am okay, a quantity of new seals came with the boat.
I think the seal in place is a new one. I went onboard today after 6 days absence and the bilge pump seems to be managing the water intake. So it now looks as if I can keep her afloat and use he until she comes out in the autumn.
Then I’ll have the bolt plates out to see if the ‘doublers’ are letting the pivot bolt ‘pass by’ .