Slightly OT but can't AWIS/AWIB/ATIS/approved observer within 100NM be used for an accurate QNH?
AIP ENR 1.7-2 para 2.1.2 refers.
ie You don't need one on the field in question.
I have noticed this idea becoming more common. The altimeter is the most important instrument for IFR and to use a QNH for an aerodrome 100 NM away is lunacy, especially if it is treated as an approved QNH for the purpose of reducing the MDA/DA.
Agent86 is completely correct.
