That length of the railway of the Board described in and authorised by the enabling Acts or either of them in the parish of Princes Risborough in the district of Wycombe in the County of Buckinghamshire which commences at a junction with the eastern terminus of Railway No.1 at a point coinciding with the boundary between that parish and the parish of Longwick-cum-Ilmer (reference point SP 789036), continuing in an easterly direction for a distance of 273 metres and terminating at reference point SP 791036.

That length of the former Thame branch railway of the Board described in and authorised by the Act of 1857 in the parish of Longwick-cum-Ilmer in the district of Wycombe in the County of Buckinghamshire which extends from a point (reference point SP 786036) 15 metres east of the eastern abutment of the bridge carrying the railway over the B4009 road near Little Horsenden Farm, continuing in an easterly direction for a distance of 340 metres and terminating by a converging junction with Railway No.1 at its eastern terminus where that railway makes a junction with the commencement of Railway No. 2 (reference point SP 789036).