The GDPR purports to bind any organisation, wheresoever it may be based, that serves individuals based in the EU, or (as the case may be) the UK.
The GDPR governs the obligations of organisations and businesses to the individuals they serve, much as consumer rights legislation governs (likewise asymmetrically) the relationship, rights and obligations between traders and consumers. Meanwhile, anti discrimination laws similarly govern those between individuals and service providers.
But do any of these other types of legislation, in either the UK or the EU, have such extraterritorial jurisdiction/reach?