To do a subject search in SOLO, do not limit yourself to Mass media - law and legislation (although these books are likely to include a chapter on contempt) try also
Contempt of Court
Free press and fair trial
Newspaper court reporting
Works on English law are in the main Reading Room on Floor 2.
Halsbury's Laws is an authoritative encyclopaedia of law in the England and Wales. The main subject volumes will give you a concise overview of the law, while the footnotes will direct you to the most important cases, legislation and commentary in that area. The print volumes are at K1 in the main Reading Room. Use the Cumulative Supplement to check for any new developments in the law since the volume was printed.
OU members can access Halsbury's Laws electronically via Lexis®Library.
Works on media law at KN343 may well include this aspect as a section. In addition books at KM563.3 may also be useful.