Terminals can be easily adapted, and the sponsors say that it would raise 100 million a year if 4 per cent of customers (their working assumption) obliged.

Proceed on the working assumption that most people will carry on behaving as they've always behaved so far.

A working assumption drawn up with management consultants' help said that between 5,000 and 10,000 extra officials would be needed across the country.

Meanwhile, there continues a slow spread of the working assumption that 'best practice' requires regulations to be clearly and prominently advertised.

First, on the working assumption that nature tends to produce variety from a few principles, he hopes to find general principles underlying our moral psychology.