Thank you for your reply Colin. I am not sure what make my road base is. It is old, possibly original to the boat – 1982; but it is good condition with 10″ wheels, newish bearings and suspension units. By doing some research on the internet, I think that it might be a Sovreign base, so I have sent them an email at Welsh Harp to see if they can confirm that and give me a price for a new trolley. I will obviously check that it would fit before buying.
Happy New Year, John