Dr Barry Morgan, Archbishop of Wales, told ITV News that he is in favour of organ donation, but feels the Human Transplantation Bill needs amending to take relatives' feelings into account.
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It will be a fine and dry day across the country with lengthy sunny spells.
England enjoyed a winning send-off to their Australia tour as they recovered from early problems leaving Wales floundering.
Veteran singer Sir Tom, 75, is gearing up for his first concerts since wife Linda died after a "fierce" battle with cancer in April.