Yup, adalimumab is another name (naming of biologicals is weird). That data suggests about 500 people in the UK are on Humira; a bit lower than I expected, but I gather they only prescribe it as a drug of last resort.
However, if you click to get map data in the second link you give it's really weird. There's basically no subscription in most of England, but very high in a few small pockets, and not in any sensible pattern (e.g. if you scroll back a couple of months there's none in all of London, and these items are prescribed in a very regular way). Maybe this search somehow doesn't get all the data?
