As I see it from the AIP AD 1.1.13
4.4 Single Pilot Operations
4.4.1 For single pilot operations in an aeroplane, the minimum RVR for all approaches shall be in accordance with the above, (4.3) 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.
So with an approved autopilot one's single pilot limits are 250' (200 x 1.25) and 600m RVR (not 550 because a DH of 250 requires the extra 50'. (4.3.1)
BUT
If flying without an A/P, single crew the minima is 200' (without PEC) but the RVR is 800m.
So you have a lower DH minimum without an A/P !!!!
BD