The phrase "and the only bit" is correct and usable in written English.
It can be used to emphasize that something is the sole or exclusive part of a larger context or discussion.
Example: "I appreciate all your feedback, but this is and the only bit that truly matters to me."
Alternatives: "and the sole part" or "and the exclusive piece".
"At the moment the country next year is a jigsaw and the only bit that is coloured in is London.
None of the kaiser's colonies would compare with his eastern empire, he boasted, and the only bit of the "dark continent" he wanted back was the Cameroons.
On the one hand, filming is glamorous and dramatic and the only bit people outside the industry are remotely interested in.
Rosebud is what was most frequently criticized in the movie, and Gilbert Seldes, in one of the most solid and intelligent reviews of "Kane" (in Esquire), called it "a phony" and "the only bit of stale stuff in the picture".
"A big satin photo book," Aggie sings, "she can look at when times get bad / Think of her mom and her dad / And the only bit of joy we ever brought her".
As the first ex-communist state to hold an EU presidency, and the only bit of the former Yugoslavia to join the 27-nation club, it would use its standing to remind the union of the awful costs of its disunity in prolonging the Yugoslav civil wars of the 1990s.European diplomacy, of course, is not built on happy fables.
With stark minor-key backup tracks, Swizz Beatz and DMX's other producers make DMX sound solitary and cornered; the only bit of lightness was "Good Girls, Bad Guys," a teasing dialogue with the female duo Dyme.
On the other hand, if you aggressively attack and ridicule the only bit of framework they have for their fantasies, you're effectively ridiculing their fantasies as well, and people stop listening and stop learning.
He has been keeping his eyes on the travails of French group Havas and though he says the only bit of the group he is interested in is the Media Planning Group he must be licking his lips at his rival's distress.
And that's not the only bit of front-facing technology built into the Sienna.
The boy turned to Armstrong and said, "Please, sir, you are the only bit of decent shade in the place".
