Interesting...Plymouth Uni (my v v long ago Alma Mater, a humble Poly back then...).
I viewed these three then very much unloved boats at QAB marina, Plymouth in 2017. All a bleddy disgrace, and I told the Uni bosun so. I offered to buy a melange of the best of the 3 (having picked thru the Sails, spars and trailers too) but my low offer was somewhat "ungraciously refused"...I left all 3 behind and brought a BRe! Have mentioned these boats on here before!
Would never have happened in my day, etc, etc.....
CT1. I've had good results bonding and sealing internally, but this formulation seems perhaps less tolerant of seawater and/or UV when used externally? The "beige" shade is usefully tonal with the off white yard finishes.
The yard Bostik stuff seems good?
Latest experience was a pal who used CT1 to fix his saildrive fairing diaphragm to the Hull (not a Swallow boat). Very poor results, failed in weeks. I did mine with RHiB repair materials and no sign of movement, peeling or detachment of any sort at the end of season. Of course, any adhesive application to used items as a repair (even more so than production use, on new materials in more controlled conditions) can be very variable.
Others on here will be better placed than me to advise on your particular application, I suspect?
PS . I'm closer even than Plymouth to the equator