From Telegraph article today22 Apr 2020 09:16
(PHE = Public Health England)
The fact the PHE test is now being ditched in favour of the commercial kits is not a shock. The system is supposed to work that way, with PHE accepting that its home-grown kit is always intended as a stopgap until the commercial kits come on stream.
One expert likened PHE's approach Covid-19 testing to sending out a recipe and ingredients - leaving a margin for error, depending on the chef - while the process used by commercial firms is more like a ready meal supplied by a supermarket that comes out the same every time.