Ministers have abandoned plans for an “amber watchlist” as Prime Minister Boris Johnson promised to keep travel rules as simple as possible. The government had been considering the new category for nations at risk of being moved into the red group under the traffic light system. But following a backlash by Tory MPs, ministerial concerns, and complaints from the travel industry, government sources confirmed there would be “no amber watchlist.” New rules allowing fully-vaccinated passengers from the United States and amber-list European countries to avoid self-isolation on arrival in the UK came into force at 4:00 a.m. on Monday. The amber watchlist would have applied to countries at risk of being moved into the red category—which requires hotel quarantine for 10 days at a cost of £1,750 ($2,435) for an adult. Reports suggested there was a fallout among Cabinet ministers over proposals to introduce the amber watchlist, designed to warn …