The whole point of the approach ban is that you should not continue the approach if you have no chance of getting in. Be it the O/M, FAF or the
1000' AAL in the UK. In this case, where Vis was reported at 1000m, there IS a possibility of having the required visual references at 1000' (3 degree slope, 3000' slant range). Regardless, a pilot-in-command may only continue beyond the "approach-ban-point" (without required visual references) IN CASE OF EMERGENCY. So, what I'm saying is, I completely understand the situation, but the regs are quite rigid in this matter. Good luck.