Update guys and gals.

My car being a 1999 4 seater is one of about (as a guess) 350 made between 1998 and 2006, I purchased a Librands rack and then examined the luggage made by Steve Simmonds, he sells a suitcase that is 75 cm wide, my rack has sides, this is good for security but the space inside is 72.5 cm across, ergo suitcase too big.
The resourceful Mr S has turned up a 72 cm wide case, is fitting me a storm cover for it, a security strap with high brake light to replace the one in the hood and on top of that a boat bag. because the suitcase sits well after consultation he offered to make a bigger boat bag for this application.

I am looking forward to the result, not necessarily the bill of course.

Chris444