The ILS 27 had been operating close to tolerance for most of the afternoon, but the fault exceeded tolerance at about 5pm resulting in the loss of the 27 Glidepath. Aircraft were unable to make an approach to 09 as the visibility was beneath the absolute minima for the ILS approach on that runway.
Departures were still allowed, I believe. I know the SZ486 from Plymouth, bypassed Bristol and just went straight onto Leeds this evening.