having this metar,I will try to land on rwy 19 (not infriging the minimums), because rvr 400 is modifying let say in a few minutes ,or it could occur a SPECI with a rvr19/ 550 in right time...btw I had a succesfull landing CAT II with rvr 225m (actually it was 180m...) ATR-42 !(I had passed the OM, so I just tried )