Spittle Buckinghamshire Harmondsworth London

I would love to hear from anyone researching Spittle in the above areas. My earliest ancestors are William Spittle b about 1760 who married Sarah Rolph 1779 St Mary`s, Ealing. I understand that family members moved to New Zealand, Australia and Canada (Lillian nee Spittle Pool). I have quite a large family tree.