Was there anything actually on approach? Secondly as the airfield has approach control, they would have been in contact with the IFR traffic. If so the IFR traffic would have been seperated from the VFR and no danger existed.
But you are right to the extent that I'd have been talking to approach assuming there was no one else to talk to (E.g. Plymouth I'd opt for plymouth Mil rather than Plymouth approach as they have radar). MInd you even the chart makers can't get the chevrons right at Newquay!!