Have a look at the UK AIP Gen 3. There’s some information there about warnings that Aerodrome Operators should disseminate.
I know it can be annoying when “windshear has been reported on final” appears on the ATIS all day when clearly it is no longer plausible, but I guess they’re just covering their backs.
There is also a good section there on the definition of Turbulence , which I believe is often confused with windshear.