I may be wrong but I think the Halmatic hulls were GRP, while the Fairey ones were definitely hot-moulded agba (like a mahogany). The one that looks most like Flying Christine II would be a Huntman 28. I'll dig out some lines and E-Mail them to you (if I can find your address).
DM
Later – Just done it. Have fun!
Edited By Dave Milbourn on 26/03/2020 14:28:43