I had made it clear that the RAF still listed TAIN as active and also gave the reference. Below, additionally, is the entry in the UK AIP. Both these sources can be taken as more accurate and reliable than "I think" or "I thought":
EG D703 TAIN
575224N 0033030W - 575054N 0034630W - 574500N 0035500W - 574500N 0040254W - 575136N 0040812W - 580324N 0034436W - 580700N 0033700W - 580300N 0033000W - 575224N 0033000W - 575224N 0033030W
Vertical Limits: OCNL notification to ALT 22000.
Activity: Ordnance, Munitions and Explosives / Unmanned Aircraft System (VLOS/BVLOS) / High Energy Manoeuvres / Para Dropping / Electronic/Optical Hazards.
Service: DACS: Tain Range on 122.750 MHz when open. DAAIS: Tain Range on 122.750 MHz when open; at other times Scottish Information on 134.850 MHz.
Contact: Pre-flight information / Booking: Range ATC, Tel: 01862-892185 Ext 4945.
Remarks: Aircraft wishing to use Dornoch or Easter Aerodromes during range opening hours are to contact Tain Range on 122.750 MHz prior to entering the range. Associated aircraft operations outside area boundary. SI 1940/684. UAS BVLOS will not be conducted above 2000 FT ALT.
Danger Area Authority: DIO.
Hours: Mon-Thu 0900-2200 (0800-2100), Fri 0900-1400 (0800-1300); and as activated by NOTAM