I can't believe you guys are signing up for this without fully understanding the finances!!
You borrow the £60k, plus additional if you need to.
You pay this to CTC...
When you complete the course, the bond is then transferred to the airline.
The airline pay you £1000 a month for 7 years, adding up to £84k, which is roughly the £60K plus interest, but obviously as interest rates have gone up recently and may fluctuate in the future, the airline's payment may not fully cover the interest. Anything additional you borrow is your problem, not the airlines.. so you will have to pay that from net salary.
So you get an extra £12k a year on top of salary. But, taking easyjet as an example, cadet starting salary is £24k... direct entry salary is £36k, difference being £12k... so makes no difference to airline.