LT3 (Registration LT61CHT) made a visit to Singapore in February 2014 as part of the Great Global Bus Tour organised by UK Trade & Investment to promote United Kingdom abroad. LT3 is a New Bus for London (NBfL) built by Wrightbus of Ballymena, Northern Ireland. The NBfL was intended by the Mayor of London Boris Johnson (and hence, colloquially known as the Borismaster. It may also be referred by some as the New Routemaster) to be the spiritual successor to the iconic Routemaster, replacing the Mercedes-Benz Citaro G articulated buses introduced by his predecessor Ken Livingstone (which in turn displaced the original Routemaster buses). Several of these displaced articulated buses were initially exported to Malta, and were later sold and re-exported to Sudan when their suitability on Maltese roads were brought into question.

The New Bus for London is a series hybrid bus (as opposed to the parallel hybrid buses tested by SBS Transit and SMRT Buses). It has a 4-cylinder, 4.5-liters Cummins ISBe engine powering a Siemens hybrid drive system and is Euro V compliant (future units are expected to be Euro VI compliant). It has three sets of doors fitted by Ventura, including a rear open platform which uses a manual door and a one-piece inwards sliding door forming as a set. The NBfL has several features that appear distinct from Singapore buses but are standard in London to comply with the Disability Discrimination Act 1995 in the UK; examples include an automated wheelchair ramp on the center exit with outwards sliding doors and roller blinds (Mobitec Smartblind) being used instead of LED signs. Passengers can access the upper deck through either of the two separate staircases. Air-conditioning was installed on the upper deck, but it was not used during the event and the NBfL was barely able to cope with Singapore's hot tropical climate. Transport for London has combined the passenger information system (including announcements), operations control and Automatic Vehicle Location functions into a single device, known as iBus which was supplied by Siemens.

The Singapore stop was one of the most extensive tours amongst all Asian cities, where the public was given unprecedented access to the NBfL's interior and exterior (In contrast, at Hong Kong the public was only able to photograph the bus from the outside). For the duration of this stop the bus was based at Hougang Depot and was driven by a SBS Transit Bus Captain. While LT3 is operated by Arriva London, Metroline decals have been placed on the bus for the duration of the Singapore stop. This was as an act of acknowledgement to ComfortDelgro's (parent company of SBS Transit) London operations Metroline, which also operates a fleet of NBfL under contract from Transport for London. Additionally, a photography contest was held by the event organizers.

On top of functions at the British High Commission, staff events at SBS Transit depots and visits to various schools, LT3's extensive Singapore Tour included several public events at:
- Conrad Centennial Singapore
- Suntec Convention & Exhibition Centre (twice)
- ONE°15 Marina Club, Sentosa Cove
- Gardens By The Bay (twice, including a British Airways promotional event)
- Buddha Tooth Relic Temple and Museum, Chinatown
- Jurong Point Shopping Centre, Boon Lay
- and last but not least, an art exhibition within LT3 at Gillman Barracks