Seems fairly accurate from what I know from hear-say. I'd guess that the £1,30 is literally extra pay on top of the base salary, per duty hour.
Just think it over once or twice before you sign up. It's a lot of money to pay for flying light turboprops initially. Though I am all for new pilots starting on planes like the Jetstreams, the marketplace does not really support that anymore. It's below 10.000kg MTOM and less than 20 seats on the 31/32, while the 41 just barely tops 10.000kg. A lot of companies don't care about that kind of experience. The Saab 2000 would be the best to hope for. That, or AIS getting their 737 ops up and running in the next two years.
Either way, there will still be cheaper ways to get a frozen ATPL and a more relevant type rating and experience. Not saying 'don't do it' but just look beyond the marketing fluff and compare options.