Post a lot of the top of the scale ATCO2 out to Heathrow.They are really short at the moment,and there shouldn't be any problems with them validating.After all one has to be suitable for Manchester,so Heathrow should be easy
If they are to be posted maybe test them on an unrealistic sim run first, with no help, followed by an interview with 2 people up their own backsides asking questions irrelevant to the post they arrived for.
