In truth, there has been a growing school of thought that says that the squadron needs to be rethought, and I suspect that PN's idea of us seeing a number of smaller squadrons (say of eight aircraft each for the FJ) may gain traction with the chaps on 5th floor who are looking at force structure issues.
Splitting one existing Sqn into 2? I can just see the political spin: "This Government has doubled the number of RAF squadrons even during these financially straitened times...."
Such units would be mutually dependent on each other for supervision and training; current sqns are barely big enough given the high dilution rates and rapid turnover of crews. So they would not be independent fighting units by any sense of the word.