D County Council v LS  EWHC 1544 (Fam)
The original decision in this case, that LS had capacity to consent to sexual relations and marriage, was revisited in light of the House of Lords decision in R v C. (1) The MCA statutory scheme should be applied in preference to the previous civil case law; the approach in R v C clearly applied to both the civil and criminal arenas, and was consistent with s3 MCA, so would be followed. (2) Capacity requires not only an understanding of the relevant information but also the ability to retain and weigh it in the balance: therefore capacity to consent to sexual relations is person- and situation-specific, and there may be factors (such as irrational fear) impeding or undermining a person's capacity to make a choice. (3) This approach applies equally to marriage. (4) On the facts, the conclusion about capacity was the same. [Caution.]
Thanks to Alex Ruck Keene (39 Essex Chambers) for providing the judgment.