Questions of scale and artful answers


 
Towards the end of her three-year odyssey to bring The Visitors series to its current state of realisation,  artist Franca Barraclough embarked on a fund-raising drive to allow her to print two of her photographs at billboard-size scale. So I walked into this show alert to what that scale delivers beyond immediate visual impact. In both cases, it is significant, writes KIERAN FINNANE.