I think the yooungest person in the house has to be over 75.
I don’t think that’s true, Bernard. At least not if you check eligibility on the government web site. There it merely states that you, as the licence holder must be 75 or over and be in receipt of pension credit. Consider the (admittedly unlikely) situation of a 76 year old man married to a 35 year old lady and he is in receipt of pension credit. He would be the licence holder and eligible for a free licence. Not that I expect that they would be watching much television!
John