Sat it in the sun today and finally got the trike un-froz.
Put some oil on the top of the gear cables.
So go out on a ride and the first dip in the shade I felt the gears start to freeze again.
In the next big shaded part, gears froze solid ..........
Nice 12 mile ride, half done with only 2 gears.
Low gear = 6 mph +/-1, high gear = 15 mph +/-2.
Its do-able but hard on the knees.
Trike is now in the cottage, hopefully I can dry all the water out of the gear cables tonight ready for the next ride ...........