As part of the contract, operators are required to use coaches in full National Express livery. On occasion, an operator will use its own branded vehicle due to lack of availability, but will be penalised financially for doing so. A wider list of additional operators are also available to bid for occasional work on the network – usually providing a one-off duplicate service to meet demand. Whilst still having to meet strict criteria, these coaches are usually not in National Express livery. National Express operates some services itself, primarily those between Stansted, Heathrow and Luton airports, and Victoria Coach Station, London Liverpool Street and Woking. Below is a list of partner operators: Ambassador Travel, Great Yarmouth Bennetts Coaches, Gloucester Bruce's Coaches, Salsburgh, North Lanarkshire Chalfont Coaches, Southall Edwards Coaches, Llantwit Fardre and Avonmouth East Yorkshire, Kingston upon Hull Galloway European, Mendlesham Go North East, Chester-Le-Street Kavanagh, Ireland Lucketts Travel, Fareham Llew Jones International, Llanrwst National Express West Midlands (Walsall Garage) Park's Motor Group, Hamilton Reading Buses, Reading Selwyns Travel, Runcorn Skills Coaches, Nottingham Stotts Coaches, Huddersfield Stagecoach Yorkshire, Barnsley The Kings Ferry, Deal Travelstar European, Walsall Yeomans Canyon Travel, Hereford Fares National Express tickets are available through a variety of sources. Most tickets are booked on-line through both the company’s own website and many third party sites, telephone bookings are also available as are tickets through the traditional channels tickets of National Express ticket offices at coach stations, third-party agents at bus stations and travel agents. Since 2013, tickets have also been available for purchase from the Post Office. All fares are revenue managed with a range of prices, meaning that cheaper fares are generally available for those booking well in advance of travel. With the introduction of competition from Megabus, more competitive internet-only Funfares were introduced on some routes. These were phased out with the introduction of a full range of revenue managed fares from 2017. There are several ticket types available, ranging from the cheapest restricted products, to a fully flexible product. Coachcards National Express offers several discounts to customers. Young Persons Coachcard – Available to people aged 16–26. This card gives a third off standard and fully flexible fares, plus 15% off events services. Senior Coachcard – Following the Government's scrapping of the concessionary half-price fares for the over-60s in October 2011, National Express introduced a Senior Coachcard. Available to over-60s, this gives a third off standard