The UK IAIP states as follows:
4.12 Aerodromes Without Published Instrument Approach Procedures
4.12.1 For an aircraft landing at an aerodrome without an instrument approach procedure either:
(a) a descent should be made in VMC until in visual contact with the ground, then fly to the destination; or
(b) an IAP at a nearby aerodrome should be flown and proceed as in (a); or
(c) if neither (a) nor (b) is possible, first obtain an accurate fix and then descend not lower than 1,000 ft above the highest obstacle within 5 NM (8 km) of the aircraft. If visual contact (as at (a) above) has not been established at this height, the aircraft should divert to a suitable alternate with a published instrument approach procedure.
This is something which the 'D-i-Y e-approach' suicide brigade, with their unapproved iToy-app let downs, don't seem to comprehend.....