A goal in either half saw King’s Lynn Town under-18s progress through to the next stage of the FA Youth Cup on Wednesday night. Blake Foster headed home a Callum Pratt delivery for Lynn’s opener at the Walks before substitute Tom Beattie stepped off the bench to set up Isaac Joblin to double the advantage going into injury time. Academy manager James Price said: “I thought the boys prepared really well and went out and stuck to their game plan. “We worked the press very well and got a goal from putting into practice what we do in training. “We forced the opposition to go long but stayed organi…