Actually at least 2 as long as you don't have to live in the UK to qualify for gang membership
I think using the exchange rate to compare costs and convert salaries is just mathematically absurd. 2.2 is a much better guesstimate.
If it costs me 1% of my wage in Australia today to buy something and then the British pound halves in value the next day has my cost of living doubled in Australia the next day because of an unrelated country? Even when it still costs me 1% of my salary to buy the same thing.
What if the Chinese Yuan doubled in value against the Australian dollar the same day as the British pound halved. Have my costs of living doubled and halved on the same day? It simply makes no sense at all using the exchange rate....being angry has no affect on maths.