Outside Controlled Airspace
1.5 An Approach Control unit at an aerodrome outside controlled airspace shall provide ATS to aircraft, as determined by the Aerodrome Operator and approved by the CAA, from the time and place at which: arriving aircraft place themselves under the control of Approach Control until control is transferred to Aerodrome Control;
departing aircraft are taken over from Aerodrome Control until they no longer wish to receive a service or are 10 minutes flying time away from the aerodrome, whichever is the sooner;
overflying aircraft place themselves under the control of Approach Control until they are clear of the approach pattern and either no longer wish to receive a service or are 10 minutes flying time away from the aerodrome, whichever is the sooner.
As the OP wasn't "arriving" ie landing" this quote is irrelevant.
Aircraft within an ATZ are required to comply with instructions from the ATC unit. Although flight in Class F and G airspace outside the ATZ is permitted without an ATC clearance, controllers will act on the basis that pilots will comply fully with their instructions in order to promote a safer operating environment for all airspace users.
As the OP was outside the ATZ the first part of quote is irrelevant. The rest fails to take account of the current "ATSOCAS" requirements
Is the manual required reading/study for ppl's?