Don,many thanks for the detailed info.Yes,there is a house opposite us ,across the river,which has a red and white lifebelt hanging on the outer wall,so I can practise on that.I will have plenty of time to practise whilst I am waiting for the 100-400 lens to return from the repair people.I think I will still have time to fit a few birds in though!!!.
Again,Don,many thanks,your time and expertise is very much appreciated.
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