No idea what it is Andybrightuk, but it definetly looks like a domestic bird, did it come near your house to feed on seeds?
Having owned lots of domestic birds in the past (childhood), I can say that the only way to catch it is to lure it with food, unless it is in a confined space like a home. We lost a lovebird when I was young it slipped out an open window, I forgot he was out of his cage. A friend had a budgie just fly into her house that was obviously an escapee, lastly my mum had a ring neck parrot that escaped and we heard of a sighting and got him back, long story but with help of friends he was captured, he was in a cherry tree indulging a lot. He was so depressed when back home that he pulled out all his feathers, and died within the year, he was pinning for his freedom. Must say that bird in your photo looked happy, lets hope he flies safely into someones home and doesn't get depressed at his lack of freedom.
Let us know if you see any more of him, makes you wish people would leave the birds in the wild where they belong.
Teresa