My wife and I will be travelling to Barbados in January. I know it's a long way off and things could change but currently the Barbados government requires visitors to have a negative Covid PCR non-DIY test not more than 72 hours before arrival.

I don't think the NHS can provide a service for travellers so does anyone know of an independent testing site in Dorset or the south west where we could get tested and get the results back in 48 hours? So far I've only found private testing sites in London.