My lad as the adult terriers,all heavily Beddy infused,out at least 3 times a week,they literally push hundreds of fox out of cover a season,they bolt more than their share and are dug to a damn site more than many a digging terrier.These terriers are bred for bushing and fox work and need to be of a size that matches their graft,mine breed true to type,There is a lineage behind mine that can be traced back over many,many generations of terriers that graft below to a standard that most would be happy to adhere to.The least worked mutt out of his 3 had a decent season,the other 2 the majority on here would,nt wish to believe the amount of earth work they have encountered,the season before and the one before that to boot.These terriers are taken out and find and push to ground what many a terrier walks past on a leash,then they enter and the reality work begins.
Morton about 35 years ago, when I lived in West Yorkshire, a friend of mine had a similar type of terrier as yours Morton, not pure Bedlington but heavily influenced. It was used mainly for ferreting and marking burrows. Though the guy said it had bolted foxes on occasions but as he preferred hunting rabbits he wasn't too bothered.
One day my Lakie bitch got stuck in a rock pile at a fox.
This lad turned up the next day to lend a hand digging my bitch out and his Beddy type terrier went to ground in the rock pile, found the fox and bolted it like it was a pro. My bitch was trapped under a rock and we eventually got her out unharmed.
This Beddy type of terrier was a handy dog and I would bet it would have been a good fox dog given the chance.
I also had a Beddy x whippet dog that would go to ground given half a chance and on more than one occasion would draw out a fox.
That was 30 years ago and then some...LOL