Upon being re-tendered it passed to London Central on 3 April 2006 being operated by Wright Eclipse Gemini bodied Volvo B7TLs.[2][3] London Central successfully retained the route when re-tendered, commencing new contracts in 2011 and 2018, with Alexander Dennis Enviro400H MMCs introduced with the commencement of the latter contract.[4][5][6] In 2018, a three-axle BCI bus was trialled on the route.[7]
On 31 July 2023, route X68 was renumbered SL6, becoming part of the Superloop network of orbital express bus routes.[8][9] Prior to being renumbered, the buses that operated route X68 also used to operate route 188, but when the buses were being reliveried, this crosslink ceased. During the day buses are stabled at Waterloo garage.[10]
Current route
Route SL6 operates via these primary locations:[11]