Well, as Fairoaks is a pure VFR airfield, then in the weather conditions you could only expect not to get in to Fairoaks, so were all along expecting to go elsewhere.
The only airfields that can supply Official actual Met reports are those with accredited Met Observers/Forecasters, and then publish this METAR via AFTN. In poor weather conditions, would you really expect to get into Fairoaks on an 'unofficial' weather report and without an IAP?
The original wording of the Strasser scheme was for emergency/precautionary landings, including those caused by a weather element.
Unfortunately IMO, the wording of the weather diversion element of the scheme is now becoming stretched to include WX diversions where there is no emergency or precautionary landing aspect,but just flying to the normal alternate destination, and certain sections of the piloting fraternity are using this to take advantage of some airfields that have agreed to participate.
Again, if your planned destination has the runway blocked at short notice, why should this be a free diversion at alternate if there is no emergency (with your aircraft). Surely every take-off includes the possibility that the runway you want to land on may not be available, and you should have an alternate planned.