I have to go with the eye witnesses, the Smith family for clothes description of my prime suspect. Tannerman was walking in the opposite direction and there's other details like different carrying style (younger child), longer hair, blanket etc. that don't match. The McCanns didn't report a blanket missing.
Where do you get anything about a blanket from ?
Do you mean the longer hair of Tannerman relative to Smithman ?
Has it ever crossed your mind that there could have been a swop over between the initial carrier and the second carrier?
As for carrying style. Anyone starting off carrying a child Tannerman style would soon befcome arm weary and change to Smithman style. Even if Tannerman were to be the Crecheman with a younger child, his arms would be dropping off carrying that way by the time Jane saw him.
The very fact that he was carrying that way tells me two things:
1) He was an inexperienced carrier of young children ... so unlikely to be a father.
2) He hadn't walked far. Imo, the crech was way too far for him to have carried like that.
Juat a couple of suggestions.
In the alleyways, on the wasteland, or within the Staff quarters from whence came a scream according to The 3A,s