Ulsterbus operate bus services to Belfast via Stranraer Ferry service on Stena Line. The Ayr railway station has regular services to Glasgow Central station, Edinburgh Waverley, Stranraer, Girvan and Kilmarnock. All services are operated by Abellio ScotRail. The railway station provides rail and sea connections via Stranraer for the connecting bus to Cairnryan for either the Stena Line ferry service to the Port of Belfast or the P&O Ferries service to Larne Harbour connecting with Northern Ireland Railways via Carrickfergus and Jordanstown to Belfast Central and Belfast Great Victoria Street. There is also the connection via Troon on P&O Ferries on a seasonal basis to Larne Harbour. The town is served by the Glasgow Prestwick International Airport just north from Ayr, which offers regional and domestic air services across Europe and the British Isles. Further destinations are available from Glasgow Airport, which is accessible by train to Paisley Gilmour Street for the connecting bus to the airport. In relation to Ayr, Glasgow Airport is away. Although the town does not have any ferry services from its harbour, it is in close proximity to ferry services to Northern Ireland. Cairnryan, south of Ayr, has up to eight daily departures to Belfast and up to seven daily departures to Larne. The Church of Scotland is the main denomination in Ayr with nine churches spread throughout the town. The Roman Catholic Church has two churches, St Paul's, Belmont and the Cathedral Church of St Margaret the successor to The Good Shepherd Cathedral which has been demolished. There is also a Free Church of Scotland, a Baptist Church and Evangelical church in John Street, a Latter-Day Saints Church at Orchard Avenue and the Southside Christian Fellowship in Ayr Town Hall. Ayr is also home to two Orange Lodges. At the United Kingdom Census 2001, Ayr had a population of 46,431, a fall of −3.2% on 1991. Mid-2008 population estimates placed the total resident population at 46,070 making Ayr the 12th largest urban area in Scotland. The 2011 census found that Ayr's population had grown by around 0.9% since the 2001 census – surpassing the total population growth of Ayr and Prestwick, which only grew by 0.63%, falling short of the national population growth of Scotland of +4.61%. In 2001, nearly 0.36% (167) people in the town could speak Scottish Gaelic – this fell to 0.34% (161) in 2011.