By Guy Taylor Widening a controversial government scheme aimed at visitors to UK airports will hurt London’s reputation as a “world-leading” business destination and make the UK “less competitive,” according to City groups and airports. The Home Office announced on Tuesday the Electronic Travel Authorisation (ETA), which requires visa-exempt passengers pay £10 and wait around three days for a permit, will be rolled-out to all nationalities next year. The ETA had previously only been required by those from several Middle Eastern countries, including Bahrain and Qatar. However, Tuesday’s news me…