Hi Cazza47,
I don't think there is any reason at all to assume that you
are going wrong.
There is no marriage to Frangleton to be found for Langham
in England or Wales, and the family info you have says
'known as' rather than 'married to'.
My father appears in the death indexes twice. Because of an
'also known as' name on his death certificate he is listed
under both names in the index, but of course with the same
reference number. I think the death certificate will name
Kitty as 'Lomax also known as Frangleton'.
It is probably important to your friend to have sight of
all Kitty's B M & D certs at this stage.
What name she gave for her father on marriage would be
particularly interesting.