"The only quick test in the U.K. at present is the lateral flow test that takes 30 minutes.."
This isn't strictly true - there are several rapid PCR tests that can be done in around an hour - but in the UK
they are almost unheard of outside a hospital situation, and the difficulty is getting hold of the kits.
The hospital where I work has three different rapid tests - one used in Emergency Admissions (and in the lab) , one in Oncology and a third variety also used in the micro lab. Our total allocation of tests for all three platforms has never exceeded 100 a day - and we could easily have used 3 times that were they available.
The other bit of the Travelweekly article that I take issue with is the 48-72 hours to get a lab result back. While it may be true, the time to do a standard PCR test varies, but is normally around 4 hours.