The ANO then will allow the IMC Pilot to take off and land using 1500m viz.
NO IT DOESN'T
ANO SECTION 1 SCHEDULE 8 PAGE 18
the holder shall not fly:
(i)........
(ii)when the aeroplane is taking off or landing at any place if the flight visibility below cloud is less than 1800 metres.
http://www.caa.co.uk/docs/33/CAP393.PDF