Thanks to everyone who gave advice and suggestions on the stiffness of hand controls some 9 months ago , the problem disappeared over the period of time as my hand grew stronger gripping the hand control. I now have another problem, when in stationary traffic on a hill to stop the car running back and remain stationary I have to feather the hand accelerator i.e increase engine speed. The hand book states this is taboo and the hand brake should be applied to stop roll back. If I apply the hand control brake by pressing down by the time I let it off and pull up on the same lever to move forward no matter how quick I am the car moves backwards. If I use the cars parking hand brake I can hold it and release gradually to accelerate with the hand control but then I have no hands on the steering wheel.
Yesterday I was in this situation on a steep hill holding the car stationary with increased engine speed, no brakes on, but when I moved forward the engine just roared and I rolled back and a brake had to be applied very quickly I was lucky nothing behind me. I had no drive forwards or reverse. RAC called out who flat bedded the car home. This morning I tried the car on my drive which is uphill and all appears to be OK. Has anyone any advice they can give me please? I had no warning lights come on and will probably need to drive the car to my repair garage a few miles away, or auto gearbox specialist 20 miles away.