Thanks kindly for this.

Since looking around and reading more on this forum I've expanded my search.

Basically for something good for carry on to fit into the following dimensions:
56cm x 36cm x 23 cm
56cm x 35cm x 20cm

The bag I listed in the OP was a bit bigger than the latter but I think I should be able to get away with it... So with your guys suggestions I will have more brands to look at, just hope I can find a tape measure easily enough or eyeball it ok