I am going to regret this post as bookworm is nearly always right .... But here goes.
The UK requirement for night vmc flights to be conducted under IFR is clearly a target for 'specified circumstances'. However, I don't see how operating in sub-VMC falls into this category. Especially, as the ability to operate in IMC (ie not VMC) is not specified but rather is not mentioned as excluded.
It would be interesting to know the CAA's intent. After all the UK has been, I believe, unique in allowing PPLs to operate under IFR (with a range of limitations)
Last edited by mm_flynn; 3rd Mar 2009 at 16:53.
Reason: Further thought