The only strict minima, assumiung you are IFR in a suitably equipped aircraft, would be the vis to commence the approach. Single Pilot IFR would need min 800m reported RVR, or possibly more if the approach required (OCH above a certain figure, or a lower category of approach lighting). There's a table with the system minima in EASA ops.
It would be illegal in the UK to commence an IFR approach if the vis was below this minima.
For take off, with only an IMC rating the recommendation is 1800m, otherwise you can pretty well do what you want.
VFR minima are clearly published in many places, The ANO is a good point of reference.