There are dozens of styles of Belgian ale, and differences between them are obvious. There isn't much difference in price. It ranges from https://www.uvinum.co.uk/beer/leffe-brune (£1.22/33cl) to https://www.uvinum.co.uk/beer/westvleteren-12 (£10.76/33cl), the reason for the high cost of Westvlereten being low volume production. https://www.uvinum.co.uk/beer/st-bernardus-abt-12 is very similar and sells for only £1.84/33cl.