BUDDY 2 years old and getting up to old tricks again!

Hi, I have not had to ask advice for a while now, as Buddy,almost two years old has seemed to be "getting there", However for the last few days his recall,which for a dog treat has been really good.He refuses to come at the end of a walk, runs away and barks.He is jumping up at my husband and barking for a big part of the off lead walk, barking if they stop to talk to people.Bud has a very strong character could very well be left to think he could control us! When he barks for attention at home we just ignore it and he stops.But its difficult to do this when we are out and about.we keep special treats for end of walk etc. suggestions welcome please! BEARDED COLLIE CROSS,