[Stooky Bill]

You can see why some of those were rejected. Anglia's triangles are the wrong colours (yellow was on the inside of the A, not the outside). Granada's is missing the line linking the arrowhead to the G. Ulster's is unrecognisable. TVS's doesn't use it's symbol at all (which by then was part of the animation but not the final lockup), the graphic in the V is instead based on the bevelling effect from the letter S in the wordmark, which doesn't make a lot of sense.

To be honest, I lived in one of the more recognisable ones (Tyne Tees) and even here it took a while to realise that the local logo was contained in the triangle. Even when I saw YTV's one the TTTV one didn't immediately click - and I'm a pres nerd.

Yorkshires is odd, one of the few logos that fit perfectly in a triangle and they originally used only used half of the chevron.

TVS's too would have fitted too but as Jas84 says they'd stopped using it as a logo by then