Although that document is very useful, personally I find the Manchester LLR is a legislative quagmire.
Ambiguities include:
Use of the route at night. It's still class D airspace, so you'd either need to be SVFR or IFR. In either case, ATC are required to provide separation and I don't see how this can be guaranteed if aircraft are not talking to ATC. As far as the CAA is concerned, the notifications in the AIP are your clearance to transit SVFR at night or in reduced vis. Bizarre, to say the least.
Should ATC be quiet enough to talk to you, what service can you expect? A FIS? Again, it's still class D airspace - so (in theory, at least) you should be under a radar control service if you are talking to Manchester Approach - which includes the passing of traffic information between VFR flights and providing separation between SVFR/IFR flights.
Minimum inflight visibility 4km. Where exactly did that figure come from? If the inflight visibility (as assessed by the aircraft commander) was 4000m, what flight rules exactly is he operating under? He cannot be VFR in class D airspace (the ANO makes no provision for a reduction to this requirement) so again, he must be SVFR operating under that odd AIP notification.