Spanish mini and midi coach manufacturer named Ferqui SL began, with the importation of the Solera luxury midicoach into the UK. While part of United Bus, Optare also for a time became the exclusive UK dealer for the distinctive full size Bova Futura coach. Low floor era Optare began introduction of low-floor buses in the UK in 1995 with the launch of the Optare Excel full size single decker. Although low floor single decker buses had begun to appear as early as 1993. Initially, the Excel used Cummins engines and Allison Transmissions with later examples (Excel 2) having Mercedes-Benz engines available as an option. The introduction of the Excel marked the start of sustained period of selling integral bus products rather than body on chassis combinations, which continued until the Darwen merger briefly brought East Lancs models to the range. With modifications of the DB250 chassis to become the DB250LF, in 1997, the Spectra became the first fully low-floor double decker bus on offer in the UK. Also in 1997 the Solo was launched and became a success for Optare. With a unique design of a front axle forward of the door, it allowed a low-floor layout in a very short bus, and also came equipped with kneeling suspension for even greater access. Its styling and innovation led to a Millennium Products award and the Queen's Award for Innovation. North American Bus Industries In 2000, Optare was bought by Hungarian owned North American Bus Industries (NABI). This gave Optare products exposure in the North American market, with an export version of the Solo finding success at several US airports and with Miami-Dade Transit in Florida. The NABI era saw the introduction of the Alero low-floor minicoach in 2001, filling a gap in the market for a low floor vehicle for use on low intensity services such as demand responsive transport, already covered at the higher capacity by the Solo. In 2004 the new derivatives of Solo were introduced offering a longer variant and also a narrower 'SlimLine' model to further capture the market. Also introduced in 2004 was the first new bus model since the Solo, the Tempo, a full size single decker with another striking design, even when considered in the environment of increasingly stylish competitor products. On 1 August 2005, NABI found itself in financial difficulties, and speculation about the future of Optare was ended with the announcement