random lock out Powermax 185 all solutions on forum tried!

The meter regulator (governor) may or may not have been changed at the same time as the meter. If the regulator was changed I'd say the new regulator is quite possibly the cause of the problem. If you approach the gas supplier, stick to the line that the problems began the day the meter was replaced in order to encourage them to replace it again.

Another approach if the boiler is less that ten years old, is to get Potterton Baxi involved. The will do a 'fixed price repair' I understand, returning as often as necessary to sort the problem. And a request to analyse the gas meter regulator behaviour from Baxi will carry more weight than from you!