5800MHz is not available on Ubiquiti equipment. When you say you have a license, I am presuming you hold an Ofcom lite license for access to Band C (5725-5850MHz)?
Up until last year, the original Ofcom regulated 5.8MHz band ("Band C") had a notch between 5795-5815MHz to protect Toll Booths who use that frequency. After pressure from UKWISPA and others, there was an Ofcom consultation document released last year and they also conducted technical studies into interference potential between BFWA usage and Toll Booth equipment usage, which found that the risk of interference to Toll Booths was minimal and therefore they removed the protective notch.
UK users now have full access across the whole of Band C (5725-5850MHz) however Ubiquiti have not yet released any firmware that removes the notch.
I am also very concerned that it appears that the latest softare release (airOS v8.5.0) is removing access to the whole 5.8GHz band for a number of EU countries, which is a decision made by their compliance team as you can read for yourself in this thread. We could do with more info on the reasoning behind this, so we can advise customers and also input this into our UBWA trainings about the downside of upgrading to this version!
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Looks like it may arrive in 8.5.1
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