London is not only a PPLA but also the capital and thus PPLC.
The more relevant feature code prevails.
Search for PPLA and PPLC and PPLG , sort in this order and use the first result.
Thank you for this question and response, it does help clarify the database search issue. However, I would like to flag that there may still be an underlying data issue. West Ilsley is a PPL rather than a PPLA; while this is reflected on the interface it looks like it may be incorrectly labelled in the downloads. Does this mean it has been fixed in the database but the downloads have not been updated?