"The most important outcome for Wales from any negotiations is to be in the single market. By upping the ante on migration, Mr Corbyn and the Labour party risk giving Theresa May the political cover needed for a hard Brexit. If the speech makes rejecting the principle of freedom of movement a priority, then it will help the Tories make a case for leaving the single market, which would be disastrous for the Welsh economy. Labour, despite being the UK opposition, cannot be trusted to know what is best for the Welsh economy."