Is there any case law in which a similar fact evidence has been found to support an allegation of sexual assault made by one boy against another?

At first blush, the similar fact evidence in this case may seem to fall on the wrong side of the line. A second boy makes a similar accusation to that made by the first, there being no corroboration of what either says. The situation resembles that of which Lord Cross spoke in Boardman v. Director of Public Prosecutions, [1974] 3 All E.R. 887, when he said (at p. 911): "If two boys make accusations of that sort (homosexual advances) at about the same time independently of one another then no doubt the ordinary man would tend to think that there was 'probably something in it'. But it is just this instinctive reaction of the ordinary man which the general rule is intended to counter ... .