The upgraded service was introduced in 2007 when Cardiff Bus deployed on the route six out of 15 new Scania OmniCity vehicles which it had purchased at a cost of £2.5 million.

[3] At the time, routes to areas in the west of Cardiff such as Caerau and Culverhouse Cross carried the number 27.

The Scania OmniCity vehicles had their own two tone green livery, equipped with seats with leather headrests, air-conditioning, reserved spaces for buggies and wheelchairs, CCTV, on-bus screens with local travel information and BBC News 24 bulletins, hearing induction loop and next stop information.

It passes through Thornhill and Llanishen in a clockwise route and returns south to the city centre via Blackweir instead of Cathays.

Amongst the place served (from south to north) are: During city centre closures on Friday and Saturday nights, the route does not circle the city centre, but instead operates directly between The Hayes and Queen Street Station, not stopping at Kingsway, Dumfries Place or Westgate Street.