Bus Company subsidiaries Crosville and Ribble. These were both longer distance services coming into Merseyside from Cheshire and Lancashire along with Crosville and Ribble services operated in Sefton, Liverpool and the Wirral only. The PTE also had significant involvement in the operation of Crosville and Ribble garages on Merseyside too. Similar arrangements also existed with Lancashire United Transport/Greater Manchester Transport and Warrington Borough Transport from services connecting Merseyside with Cheshire, Greater Manchester and Lancashire. After deregulation, the Merseyside Transport operations were branded as Merseybus, and were subsequently privatised as MTL. The previous co-ordination of Merseyside's bus network disappeared as Crosville, Ribble now known as North Western and Greater Manchester's GM Buses became competitors of Merseybus along with new entrants like CMT Buses, Fareway, Halton Transport, Liverbus, Liverlne, PMT's Red Rider, Village Group, and other smaller operators. Merseyside's popular bus corridors became a hot-bed of intense competition with less lucrative services ignored and in some cases disappearing. Ultimately things settled down in the mid-1990s with Merseybus parent company MTL took over a number of the new entrants, some disappearing and North Western now owned by Arriva the remainder. In 2000 MTL was bought by Arriva and is now part of an enlarged Arriva North West. However Arriva was required by the Monopolies & Mergers Commission to divest some of its Liverpool operations; which are now operated by Stagecoach Merseyside & South Lancashire. There are also smaller Merseyside operators like Cumfybus and HTL Buses. Today, Merseytravel is also responsible for providing bus services which are considered socially necessary but are not profitable, these are operated by other operators, using a best value tendering system. Fares are presently subsidised at levels lower than local commercial services. Ferries and tunnels Merseytravel owns and operates the Mersey Ferry service between Liverpool Pier Head, Seacombe in Wallasey and Woodside in Birkenhead. The fleet consists of two vessels: Royal Iris of the Mersey and Snowdrop. There are three transport tunnels under the River Mersey. The passenger transport executive is responsible for the two road vehicular tunnels under the River Mersey, one connecting Birkenhead to Liverpool city centre, the other, Wallasey, to the centre of Liverpool, and consequently it controls the Mersey Tunnels Police. The tunnel to, and from, Birkenhead is the Queensway Tunnel, and the Wallasey, the Kingsway Tunnel. Merseyrail also runs through a railway tunnel under the river connecting central Liverpool and Birkenhead, which was the