Group acquired another licensed-taxi and private-hire company in Birmingham. The company has since been renamed Computer Cab (Birmingham) Ltd. In June 2015, ComfortDelGro was shortlisted to bid for the London Overground railway concession but lost out to Arriva Rail London. In February 2018, the NAT Group in South Wales was purchased with 100+ buses for £13.4 million. ComfortDelGro has since replaced the existing Managing Director, with Adam Keen of Damory Coaches taking over in 2019. Under ComfortDelGro, NAT Group has seen substantial expansion with a new rebrand, and also the termination of all overseas coach work due to the COVID-19 pandemic. NAT Group also operate the important Bristol to Chepstow 'Severn Express' link in joint partnership with TrawsCymru and Monmouthshire County Council, branded as the X7 from 15 June 2020. In December 2021, ComfortDelGro purchased Megabus and the remaining 35% of Scottish Citylink from Stagecoach. CityFleet Networks ComfortDelGro also owns CityFleet Networks, which operates Westbus UK, as well as taxi services in a number of UK cities, including ComCab and Comfort Executive. Comcab, also known as Computer Cab, operates taxis in London, Edinburgh, Aberdeen and Liverpool, and operates a fleet of 6,300 radio taxis and private hire vehicles providing a service to local business and private customers. CityFleets Network was previously a joint venture between ComfortDelGro (51%) and Australia-based Cabcharge Australia (49%) until June 2016, when ComfortDelGro purchased the 49% stake from Cabcharge. Ireland In Ireland, ComfortDelGro operates the Irish Citylink ComfortDelGro, an inter-city coach services with over 20 coaches in Dublin, Galway, Clifden and Cork. Australia ComfortDelGro Australia is ComfortDelGro's Australian subsidiary, and operates buses in New South Wales, Victoria, Queensland, Australian Capital Territory and Northern Territory. The subsidiary started out in 2005 as a joint venture between ComfortDelGro (51%) and Australian taxi company Cabcharge (49%) known as ComfortDelGro Cabcharge (CDC), to purchase Westbus and Hillsbus in Sydney and Hunter Valley Buses from National Express. In August 2006, ComfortDelGro Cabcharge expanded purchasing the Western Sydney services of Baxter's Bus Lines followed in August 2007 by Morisett Bus Service, Sugar Valley Coachlines and Toronto Bus Service. In November 2008, Kefford Corporation in Victoria was purchased followed in September 2012 by Queanbeyan-based Deane's Buslines and Transborder Express, the Melbourne bus services of Driver Group in July 2013 and the Blue Mountains Bus Company in August 2014. In February 2017, ComfortDelGro purchased Cabcharge's shares in the business with it rebranded ComfortDelGro Australia.