Right guys have mounted the screen and I take back my recommendation above.
The service from Vivo Mounts was great, but the mount itself is rubbish.
According to the website it can take up to 32" tvs and up to 23kg's
Well it wasn't suitable for my 26" 10kg screen so I cannot recommend it.
When the screen was folded back to the wall on it, because of the swivel arm, that meant that the screen was wonky. When the screen is pulled right out with the arm at 90 degrees to the wall it is perfectly level but who wants to have that all the time?
Finally, I went for some No 12 screws 3" long to make sure it fixed into the batton nice and tight. Well to be honest with only two screws holding it up, I wouldn't trust it.
Eventually what I did was used the bracket but just got rid of the swivel arm and mounted the bolt at the back of the screen (which would normally go into the swivel arm) into the hole on the bit that attaches to the wall.... if that makes sense.
End result is that the tv is up and looks great, just I have lost the ability to swivel the screen (as much) which is the main reason for buying this bracket.....