Thanks for the suggestions Plantoid, have just come back from a week of head scratching, pondering and heavy labour and the drainage around the field, garden and house has become priority number one. There is a spring at the top of the property and a stream running all the way across and behind the house, further investigation has shown where old underground culverts have started to collapse, so the water is tracking down the hill making everything a little bit more soggy than usual.
Repairs and clearance of obstacles has started and further land drainage will be added across the field in good time, although it not been mini-diggers but good old pick and shovel this week.