i don't know if it helps you but those boats are circa 1200kg according to JBT when i bought my RC from them. so a 1600kg trailer would be borderline i would guess, 1800 is more likely perhaps.
i don't know the above for sure, just passing on what they told me.
this may impact your legal ability to tow it though, i.e depending on the licence you have and your tow car etc. you may need to do the trailer towing test depending on when you passed...keep it in mind as it is an extra 5-600 quid to do it.