Hi Ian,
I double checked with our Compliance team.
No Aruba product is approved for use on channels 149-165 in UK or Ireland. If you have a SW version that is showing these channels are allowed, this is a bug and almost certainly will be changed in a future release.
Compliance tells me that this band is only approved for 25mW anyway for license holders, which is completely inadequate for outdoor PtP links.
Regardless, we support and certify all of the allowed unlicensed channels in each country in which we operate. The only licensed band we support is the 4.9GHz public safety band in US and JP. No other licensed bands are available.
I recommend you deploy using channels 100-140.
-cl