Welcome to pemet - (P)lain (E)nglish (MET) aviation forecasts.
(Naturally) it has nothing to do with Metservice or CAA. The official position is that ICAO avmet
should be manually decoded, possibly with the help of a card produced by CAA. Note that Metservice does not guarantee the forecast,
CAA does not guarantee the card and I do not guarantee the translation.
The site works by logging into MetFlight on your behalf (ie using your login and password)
and collecting area briefings which are then translated and output in plain English.
SIGMET locations are translated for domestic briefings. OCEANIC SIGMETs are not translated.