1 See Ad1.1 Para 4.4.1
4.4 Single pilot operation
4.4.1 For single pilot operations in an aeroplane, the minimum RVR for all approaches shall be in accordance with the above, except that an RVR of less than 800 m is not permitted unless using a suitable autopilot coupled to an ILS or MLS, in which case normal minima apply. The Decision Height applied must not be less than 1.25 x the minimum use height for the autopilot.
ANO schedule 8 PPL Priveleges
(a)The licence is subject to the conditions and restrictions specified in paragraph 1.175 of JAR-FCL 1.
(b) The holder shall not, unless his licence includes an instrument rating (aeroplane) or an instrument meteorological conditions rating (aeroplanes), fly as pilot in command of such an aeroplane:
(i) on a flight outside controlled airspace when the flight visibility is less than 3km;
(ii) on a special VFR flight in a control zone in a flight visibility of less than 10 km except on a route or in an aerodrome traffic zone notified for the purpose of this sub-paragraph; or
(iii) out of sight of the surface.
(c) The holder shall not unless his licence includes an instrument meteorological conditions rating (aeroplanes), fly as pilot in command or co- pilot of such an aeroplane flying in Class D or E airspace in circumstances which require compliance with the Instrument Flight Rules.
If You have an IMC Rateing then its 1800mts