It is regretful that some ATC units in class D airspace seem 'unable to handle' a mixture of IFR arrivals and departures mixed with VFR transits and end up 'instructing' the VFR transits to remain clear. The procedures for handling transits with minimum disruption are clearly laid down in the MATS Part 1, and as I said, DAP require the airspace controlling authority to make provision to allow access to other airspace users.
Interestingly I note from AIP amendments that SRA's are about to be introduced at Robin Hood; does this mean they've got an on-site radar now? If so, this should be used to facilitate VFR transits now, not just if class D is introduced. This will give the local GA fraternity more confidence in the ability of the ATC unit to facilitate transits mixing with their IFR traffic.