Well in 2012 the LOROL (DB) section of the scheme was in good health:
"London Overground Rail Operations is set to reduce the level of employee contributions into its defined benefit (DB) final salary pension scheme.
This is possible because the DB scheme is in surplus, so it has more assets in its fund than it needs to meet its liabilities to pay current and future pensions.
The train operator is currently in consultation with staff and unions about reducing employer and employee contributions. Employee contributions could fall from 10.6% to 9.28% from July.
Under the scheme's structure, 40% of contributions are paid by employees and 60% by London Overground Rail Operations.
Darren Hockaday, HR director at London Overground Rail Operations, said: "Although [the contributions] are coming down, they are not coming down as much as we could afford.
"We are keeping a buffer of slightly more contributions, which is seen as a very good compromise with our trade union colleagues. This was what the business was proposing to do, in terms of having the right balance between keeping the scheme affordable."
There's probably about £1000 a month going in for drivers when employer and employe contributions are combined. Couple this with salary sacrifice, etc and it is probably one of the few final salary schemes still in good health. It benefits those in the rail industry on lower income too so it upholds good values. Remember as well that ill health will often terminate a drivers career before many other positions due to the need to meet certain medical standards.