By Guy Taylor New Home Office red tape on visa-exempt travellers entering the UK will divert passengers to Europe and risk Heathrow’s hub status, experts have warned. The new so-called Electronic Travel Authorisation (ETA) means passengers arriving in Britain have to pay a £10 fee and wait up to three days for an online permit, even when travelling via connecting flights. It will be mandatory for all “non-visa” overseas visitors to the UK by the end of 2024, excluding Irish people, and has already been introduced for Qatari nationals. A spokesperson for Heathrow told City A.M. that should the …