A quick update.
She went back to the garage on Saturday to be checked over, I requested that the swivel bearings be checked and it was all confirmed ok when I collected it. Monday morning driving in to work, about 30 miles down the road and the wheel starts wobbling again. I jacked it up in the work car park and found play again at 6 and 12.
Fine, says I, I will do it here. So wheel off, brake caliper off, track rod off and a scale was put on to check the preload. 2kg. Not really enough. So I undid the pin and found a nice stack of four shims. I took two out and torqued everything back up, 7.8kg. Much better. Off for a test drive and it is about 90% better only having done one side. Got home (didnt want the boss thinking I was completely taking the Mickey) and redid the other side and its as sweet as a nut now. I have ordered a refurb kit of new bearings, shims etc so can redo them when I need to as its only a matter of time.
Thanks for all your help everyone, problem solved.
Now, on to finding out where that leak is coming from....