TAF is forecasted weather, and METAR is the latest reported actual weather.
The precision of forecasts is not always the best, and they sometimes change - as in this case! The latest update to this forecast aligns a bit better with the actual observed conditions.
Brilliant - thank you - is reassuring to know I was simply impatient (should have waited for updated TAF), rather than totally misunderstanding.
The prompt reply was much appreciated.
Kind regards,
Alasdair