Update:

My oldest boy has just phoned me from his mothers house.
Last communication was mid Dec.
They want to see me and come at weekends again.

I chose not to go down the court route.
Court action would have taken a lot longer than 8 weeks to advance, it would have also upped the anti and lead to more frustration and loss of earnings.

I say to you all, if court action was a guarantee of success then it would have been a first option. Unfortunately we are at the mercy of a system that is broken.
I applaude anyone that has actually achieved the goal of continuing to be the same parent for their children with no conditions attached post separation.

Kornelius