HI Guys, turned out not to be the pedal problem that Toyota suggested as the problem was still there. Toyota had another look and threw their hands up.
My mechanic suggested a local specialist in car computers and I took it to him. He said he wasn't sure but thought it was the aftermarket cruise control fitted when I bought it. I gave him the ok to take it out and it ran better than new. Kept it until 2017 and then sold it and bought an Isuzu Ute which I am happy with.
I think the Toyota would still be going strong had I kept it.