I called on Thursday (6th) at 13.50 requesting a F.I.S and got a prompt reply on 132.8
Unfortunately they couldn't see my squawk on their radar (although they said they could see it on the Heathrow radar?). Due to "staff training" they were going off frequency at 2pm so I got a rather brief F.I.S
Looking forward to a full time service sometime soon and hoping that everyone in their area of coverage will use the service so we can avoid any airprox events or zone busts.