Where is it recorded, or when was PC West supposed to have relayed to MB the fact that Jeremy had spoken to PC West about his fathers collection of 12 bores and .410's?
The form Pc West used features a box that contains 7 options for the information source: 999 (even though 999 calls were routed to HQIR, not the room at Chelmsford police station where Pc West worked), Internal Line, Exchange Line, Direct Alarm, Radio, Verbal Report, and Officer's Report.
In contrast, the form that Malcom Bonnett used features a box that contains only 4 options for the information source: 999, Exchange Line, Radio, and Private Wire.
If Pc West used an internal line to contact MB, MB had no "Internal Line" option to circle on his form. The fact that MB circled "Exchange Line" is therefore not significant.
MB's log states "Message passed to CD by the son of Mr Bamber, after the phone went dead. Mr Bamber has a collection of shotguns and ยท410's. As CD refers to the control room at Chelmsford police station, not HQIR (where radio reports from WHF were received), this effectively asserts that the information was passed via Pc West. However, there's no indication as to when this occurred. In contrast, Pc West said at JB's trial (according to the court transcript) "I asked him did anyone have access to any firearms and he told me his father had a collection of .410 12 bore shotguns and .22 rifles."