"Being refused treatment"

My daughter recieved a severe burn to her left hand. She is at University in London, quite a long way from her home in Liverpool, so is familiarising the different places she needs to go to. With my help I directed her in the direction of A & E at Guys hospital, as this was closest to her university, as she needed the dressing changed every 3 days on advice from the burns unit at Whistan Hospital in Liverpool. On her arrival and with a letter from the burns unit she approached a member of staff at A & E, after a nurse was called, who inspected the letter and told her that she couldnt have the dressing changed there??? The dressing was bloody and the sore weeping and yet she was still refused.. Unacceptable considering this is a NHS hospital and as a National Insurance payer I thought that she would have been entitled to treatment. She wasnt aggressive, is quite a timid person and came out really distressed, humiliated and crying.