Hi BlackdogPete,...if you have observed guys doing the job,..you will know that the prime requisite for capturing hares,..live,..is in the positioning of the long nets (and you will up your odds by using several hundred yards of netting)...but a major requirement , as you would know, is in the boxing and careful handling of the captured animals...
You also need to recruit enough help, (beaters) to encourage the hares to move forwards towards the hedgerows....Your nets will usually be placed behind them.
Netting hares by day, is obviously a different procedure to taking them by night....