I think this has been answered elsewhere but there is no such thing as a
“target programme”. There is the latest Accepted Programme - which should reflect how you currently plan to do the work - and if it isn’t it could be rejected in accordance with 31.3.
When you say “target date” which is not a contractual term, I suspect that you mean
“planned Completion” which is a contractual term. As always within the contract, if planned Completion is beyond Completion date the only way to recover any additional cost and to get Completion date moved is if you can prove the reason for the delay in planned Completion is one of the reasons listed in 60.1 as to why this event is not your risk and hence a compensation event.