In 1985 there was no digital footprint. All times are approx. The police station clock was out by 10 minutes. According to a witness and EP, one of JM's house shares, also had a clock 10 minutes out. There is no reliable data.
Where is it stated that the station clock was definitely out by 10 minutes? West stated that it was 'on occasion' inaccurate but on 'very FEW occasions'. Bamber made a BIG thing about West being a liar when he recorded 3:36 and that he did that on purpose. Now of course, he claims Nevill called the police so abandoned the West perjury claim and agree's he called at 3:36.

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The other point being that the station clock was digital - how often do digital clocks run fast? West clearly either read the clock wrong or he entered the time at the end of the call and not the beginning.