Guys
After the second 2.5K mile ride on the TT this year it was quite obvious to me that the seat was less than perfect for these long hauls. After looking at various options to solve this issue I got the standard seat re worked.
Being almost 6' 4" even with the seat in the highest position my legs would cramp up after a couple of hours.
My solution was 1.5" of height in the front and made wider to give more thigh support

Also had the rear sorted for the other half also 1.5" higher plus 1.5" wider all around with a more pronounced hump stopping her sliding into me under heavy braking. The top cover is more anti slip also all adding to a far better and comfortable ride.
Not the solution for everyone but its sorted me and her and at £120 for both seats by far the cheapest option with a great result.
Chaos