Thanks for that, Norman. In fact the keyword Wayfarer only gives two results, a launch trolley and a heavy duty launch trolley. I gather from looking at those in detail that the 275 Road Base is the correct road trailer that goes with these, but there are no useful details given. Also they are expensive. There’s no mention of the Super C. Meanwhile as time was running out I asked the advice of a leading Wayfarer sailor and have ordered a combi-trailer from Sovereign of Welsh Harp. I’ll report here on the trailer when I’ve used it a few times. Thanks for all contributions to my enquiry.