A connection between the GCR and the former Buckinghamshire Railway at Calvert was opened in 1942, leaving the A&B route to Verney Junction with no purpose other than as a diversionary route.
Hubungan antara GCR dan mantan Buckinghamshire Kereta api di Calvert dibuka pada 1942, meninggalkan A&B rute ke Verney Persimpangan dengan tujuan tidak lain daripada sebagai diversionary rute.