Plans to discount bus travel for young people in Wales have been botched, according to Plaid Cymru.
As part of its budget deal with the Liberal Democrats, the Welsh government announced a trial scheme to cap single bus fares at £1 for 16-21 year olds.
But Plaid says it will put younger people at a disadvantage with the cap not applying to under-16s.
Transport Secretary Ken Skates said negotiations are underway with the bus industry to ensure young people do not have to pay more than the cap.
He said that "ideally" bus companies would contribute to ensure tickets for younger bus users, but that this had not been confirmed.