I have also recently heard of a few sightings further in to Herefordshire. Until recently I would have said that they are unlikely to spread in any direction where there isn't sufficient large areas of woodland but some of these sightings suggest either illegal movements or there have been some animals spreading in directions I would not have expected. I have shot 2 in the last 10 years 2-3 miles from their nearest known location (Linton Ridge area), both young males and both within 3 fields of each other but 3 years apart. I did see a dead young boar (well under 1 year old) on the central reservation of the M50 a few years ago that would suggest Dymock Woods as a likely next area to become inhabited but not heard of any sightings in that direction since although it is possible that FC dealt with them on arrival if the rest of the group did cross the motorway. As has already been said, most single animals turning up in odd places are likely to be young males that have been turfed out by the dominant boar who will not tolerate maturing males in female sounder groups when he turns up to serve any sows in oestrus. I know they have spread down the Wye Valley in to Monmouthshire which is no surprise given the habitat although I believe the local welcoming committee have given them a fair hiding!