Hey mate,I can confirm you were near a definite boar sighting.
You know the picture saying "im sure some of the locals will recognise the view" or something like that.
Across the river there is a small bit of sand near a bank.
Well if you go up there to the edge of the woods my cousin has seen and grunted by there and they occasionally grunt back to him.
I have been there myself but there were not any there at the time.
And I don't think you swam to wales,Forest of dean to herefordshire you might of swam but im pretty sure its not wales
so you cant swim from fod to gwent or monmout