strictly due to law you may continue when you have a solid visual contact with the rwy or the app lights to decision altitude, and then finally decide regardless what the weather report says.
Not according to EU-OPS:
OPS 1.405 (a) The commander or the pilot to whom conduct of the flight has been delegated may commence an instrument approach regardless of the reported RVR/Visibility but the approach shall not be continued beyond the outer marker, or equivalent position, if the reported RVR/visibility is less than the applicable minima (see OPS 1.192).
...
(e) The approach may be continued below DA/H or MDA/H and the landing may be completed provided that the required visual reference is established at the DA/H or MDA/H and is maintained.
The visual reference mentioned in paragraph (e) does not exempt you from the restriction of paragraph (a). If it did, the approach ban would be practically unenforceable from outside the cockpit, as the crew could always claim that they saw the lights despite the low reported RVR.