Berkut,
Would have loved to have been able to help a fellow Swiss resident, but unfortunately we only retain this sort of data for 24hours due to the sheer volume of data that we process on a daily basis.
Unless one of the pprune hamsters still has this in their dispatch system (which as it is over a week old is unlikely) your best bet would be to phone the UK Met Office's helpdesk on +44-1344-856-666 and they will be able to provide you the required data. I should also mention that they will charge you for retrieval....the last time we needed similar data it cost us about CHF120.00.
Stay safe...
Whooaahh!!!