If I pass a C1, will I also get a B+E entitlement?

[Petrolhead_Rich]

Right, so I've been looking at adding the B+E entitlement to my license to allow the towing of trailers, but it seems for an extra few hundred quid I could just do a C1 course, I've been told passing my C1 would give me my B+E entitlement, but I can't find any hard proof of this, so the question is this, If I pass my C1 will it give me a B+E entitlement, or do I have to pass my C1+E or even a C+E to get it, or do none of these provide the lesser B+E entitlement?