share farming

My husband and I (26 yrs and 30 yrs old) and our two sons (10 yrs and 2 yrs old) are seeking the opportunity to work for/ alongside a retiring farmer or estate with long-term aim to lease or buy the farm. We are sheep farmers – we own our house but rent all of our land - and have our own flock of texel sheep and lambs and my husband has 10 years experience in dairy farming also – plus various contract farming including sheering, fencing, and tractor-work, and also self-employed building and gardening/ landscaping work. We are currently based in Bedfordshire – but willing to move anywhere within roughly a three hour radius. If anyone can offer any opportunity or help/advice or point me in the right direction it would be very much appreciated, thank you. Charlotte