A good demonstration of the positioning the high vis red patches on all types of vehicle. Still sheet steel visors, no ram operated vision blocks yet.
June 1973, good to have a date mark because I can see it is pre-Sept 1973. This was the date when the plate for supporting the base for VHF whip for the Pye W15 was fitted to the roof rear offside.
Also pre-August 1973 when Major Pearce's adjustable mount for the Discharger Smoke Grenade No11 Mk 1 was fitted to the mid front near side roof over the circular aerial downlead port (already present on all Pigs)
Can't make out if it is 23 BK 60 or 23 BK 80. Both were FV1612 FFW converted to FV1611 role & uparmoured. I see it has no extractor fans. Appears to have no comms. Although the side-on Pig is clearly on HF judging by the length of the two whips. Despite the arrival of the VHF Pye Westminsters later on in the year there was a delay in them being operational due to problems with the delivery of the correct crystals.