Presumably (?) you're getting that information from Flightradar. The smaller aircraft tend to get lost on FR24 once they get quite low and the website plots an arrival airport based on where it 'lost' the signal for that aircraft. Thus, a number of aircraft have been showing as diverted to Farnborough when actually they landed at SOU.
https://www.flightradar24.com/data/a...-ecog/#96b39ef
An example, that says diverted to FAB, but if you look at the track, the aircraft was turning in for an approach into SOU when it's track got lost. It never diverted.