Soay tups can be absolute wee sh!t3$, although yours is starting early (doesn't bode well for the future). In the end we decided not to keep a Soay tup so we don't breed our 3 Soay ewes. He could well cause a ewe to abort, or damage the foetus, and may beat up the lambs after they are born. He could also attack the ewes when they are giving birth, as a reaction to the 'strange' hormones he will smell, and their strange actions (I experienced this with a Manx wether, but just as bad)
As Sally says, get him out, plus the wethers, asap. It's more important really than your field rotation, unless you can find somewhere else to keep him. Don't leave him on his own.