Well, turns out they are still out after a few more miles at various speeds. Id had enough of sitting in the tyre fitters getting them to sort it so i did some research and bought 2 bags of Magnum plus balance beads from Devon 4x4. I knew one tyre was out but only by a few 10s if grams. The beads arrived and it stated they cant be put through the tyre valve and must go in via a broken bead. Oh dear.
30 mins on youtube plus some fuel hose, a funnel and a spare tyre valve and I confirmed they do go through, just veeeery slowly.
I took out the valve on the suspect tyre, attached my hose to funnel device and taped it upright (valve at 6 o clock of course). Poured the beads in and tapped it with a mallet. Was not moving!
So youtube came to the rescue and after using my hair clippers as a vibrator device, all beads went in within 10 mins. Other vibrating devices will work.... my neighbours must gave thought id lost it LOL
Anyway, it drives spot on now, no imbalance. Pleased and those beads are cheap. They do the job if your a bit out with lead weights, but are perhaps not a substitute. Its been suggested that lead and beads together wont work, but thats not the case. Smooth as anything now.