.....and indeed, sleeper, I think standard terms. What I am saying is that 'contingency' is not intended for arrival delays, but for other unexpected abnormalities. Where 'arrival delays' are anticipated, the UK CAA require that added to planned trip. Same result, different approach.
Out of interest, can you, as with 'true' contingency fuel, 'legally' burn all your 'contingency' before take-off and what happens if you do use it all en-route before destination? ie Is it just a planning 'thought' or an operational one?