Typically, a variation of a particular bus route will have a suffix added, or take a neighbouring number. One place where this is the exception however is on the Isle of Wight, where there are three such routes but both variations share the same number. They are the 1 (Newport - Cowes via Round House or Park & Ride), 7 (Newport - Alum Bay via Shalfleet or Calbourne), and 9 (Newport - Ryde via Fairlee or Staplers).
On the mainland (but not too far away), Bluestar 9 from Southampton has two separate branches which split from the trunk route at Blackfield - one to Langley & Lepe and the other to Fawley & Calshot. Also, in Wiltshire, Salisbury Reds operated two separate X5 routes (albeit following the same corridor as far as Amesbury) from Salisbury to Swindon and Larkhill before the latter was renumbered as the X4 a few years ago.
Are there any other similar examples?
On the mainland (but not too far away), Bluestar 9 from Southampton has two separate branches which split from the trunk route at Blackfield - one to Langley & Lepe and the other to Fawley & Calshot. Also, in Wiltshire, Salisbury Reds operated two separate X5 routes (albeit following the same corridor as far as Amesbury) from Salisbury to Swindon and Larkhill before the latter was renumbered as the X4 a few years ago.
Are there any other similar examples?