Mr. John Crichton at the Transport, Infrastructure and Communities Committee

I think you're referring to remote aerodrome advisory services as opposed to on-site services. They're less expensive, but for airports like that, with very low traffic volumes--you're talking about one, two, or three movements an hour--the exact same level of service can be provided from a remote site.

This has been provided for years in this country, at scores of different sites. There have been no safety issues attributed to that method of providing service.