This resulted in Series A, version 2, which introduced minor security enhancements. The biometric chip was relocated from the official observations page to inside the cover, and the observations page itself was moved from the back of the passport to immediately after the data page. All new art was produced for version 2, this time with a coastal theme. Data and visa pages featured coastal scenes, wildlife and meteorological symbols. Renewal of the passport required physical cancellation of the old passport, which was then returned to the bearer. The top-right corners of its front and back covers were cut off, as well as the top-right corner of the final pair of pages, which had been bound in plastic with the bearer's details and a digital chip; a white bar-coded form stating "Renewal" and the bearer's personal details was stuck onto the back cover. HMPO's contract with De La Rue involved the design of a new generation of biometric passport, which was released in October 2015 as the Series B passport. The cover design remained the same as Series A, with minor changes to the cover material. The number of pages of a standard passport was increased from 32 to 34, and the 50-page 'jumbo' passport replaced the previous 48-page business passport. New security features included rich three-dimensional UV imagery, cross-page printing and a single-sheet bio-data page joined with the back cover. At the time of its introduction, no other passport offered visa free access to more countries than the UK Series B British passport. The theme of the Series B passport was 'Creative United Kingdom', and HMPO described the Series B artwork as the most intricate ever featured in a British passport. Each double-spread page set featured artwork celebrating 500 years of achievements in art, architecture and innovation in the UK. Ordinance Survey maps were also printed inside featuring places related to the imagery. A portrait of William Shakespeare was embedded in each page as a watermark. The Series B passport was initially issued to British citizens with "European Union" printed on the cover. However, new stocks of the Series B from March 2019 onwards removed the reference in anticipation of withdrawal from the union. The premature change was controversial given the uncertainty and division in the UK during 2019. The introduction of the burgundy machine-readable passport between 1988 and 1993 had been met with significant resistance. The burgundy passports attracted criticism for their perceived flimsiness, mass-produced nature and sudden deviation from the traditional design. There was speculation regarding re-introduction of the old-style passport following the UK's withdrawal from the European Union. but the government denied any immediate plans.