Custom made by Wolff Olins. Do a search first...

I'll remember that next time Marten. Sorry for wasting your time.

As alternatives, consider FF Netto, Tondo, and FF Speak.

It's all right, kcullen80! You didn't waste my time. You gave me a chance to both give you the answer to your question and a tip on how to search. If I thought it was a waste of time I wouldn't have answered at all...

Another alternate:

Chevin.

Nick Cooke

Really nice choice of fonts Stephen and Nick. Very impressed. Thanks for your hep!

I know this is a bit late, but you're correct, it is Vag Rounded.

That sarky fellow who suggested you "do a search first" was way off - Wolff Olins designed the distinctive Tate logo, but the font was commissioned by Newlyn: http://www.newlyn.com/work/client/tate

As far as I can see, it's not commercially available, but the suggestions you've had are good alternatives. There are also, it seems, various people who have emulated the font itself, though in my opinion it needs some tweaking.
For example: http://fontzone.net/font-details/Tate-Regular/
though in this one the lower case "t" needs to have its tail removed.

I hope that's been a bit helpful!

...and Marten Fischer should take his own advice next time and do a proper search.

"I know this is a bit late, but you're correct, it is Vag Rounded."

huh?

If you follow the link, you'll see that the company state that they used Vag Rounded and modified it - exactly what the OP said.
So he was exactly right when he said, "To my untrained eye it looks like a bespoke cut of Vag Rounded Light". :) should have made that clearer!!

well, i think if i had to pick a substitute it might be FF Zwo Light. not the right "t" but close in other regards.

Eleanor, if your second link is a font that tries to copy the official Tate font as closely as possible, that would make it unethical, in which case it would be best to remove that link.

hhp