Daniel Alexander QC, sitting as a deputy judge of the High Court, provided guidance on how a case of obviousness over common general knowledge alone should be pleaded and how this affected the construction of the claims.
(Meter-Tech LLC & Another v British Gas Trading Ltd [2016] EWHC 2278 (Pat), 16 September 2016.)
http://www.bailii.org/ew/cases/EWHC/Patents/2016/2278.html