Hi Steve,
Try, Bet IE
or
LayBotPro, this one needs one to nominate if 1st,2nd,3rd or 4th Fav in the live market then set the price parameters , it is also the simplest to use which is important with some of these things because they can be confusing to set up.

There is a free trial with some of these also.

Some others to look at which are more complicated to set up are...
Market Feeder Pro
AutoBet
BetGrail
Auto-Betfair 1.0

Cheers.

__________________
Cheers.