The ACT NoW study is a pragmatic, multi-centre randomize controlled trial (RCT) with a nested qualitative study and full economic evaluation. The RCT involves comparison of two arms within this target population: a manualized Speech and Language Therapy (SLT) intervention; and an 'attention control'. Randomization will be stratified by diagnosis/severity as well as site/centre, with an 'intention to treat' approach.