It's a pretty rubbish deal for the next cadre of junior pilots. With 4 years to OCU completion and a further 6 years before proper rates of flying pay the additional 'recruitment and retention' rates for pilots in the first 10 years is bleak.
Asking for a 6 year RoS at around the 11 year point (for £70k) is just nuts. They have turned the virtual exit point at 11 to 12 years into a contractual one. By this point the average pilot will be wondering why he has been working so hard as a JO, whilst his colleagues in ground branches are marching up the career, pay and pension ladder. This is not the point where you hold a RoS gun to a pilot's head - you have just kicked them around for 11 years with little financial gain so the airlines or private sector will look very seductive.
Madness.