Just so I am clear, the information my husband needs to send me in regards to the I-129f as in copies of our I-130 & I-129f applications, tax records etc.....I only need that for the interview right?
Just because he is planning to fly over to come to the interview with me so in fact he can just bring it all with him correct?

What to send to your Spouse once the I-129F is approved (NOA2):
1. A copy of the entire I-129f and I-130 package (that you made when you sent the petition in) and a copy of information that you sent back due to an RFE (if you received one).
2. I-134 / I-864 Affidavit of Support form. Ensure it is notarized (by a public notary), with all required supporting evidence. Some consulates may require one or the other forms. You will need to verify with the consulate which they require. You can call or email the consulate to check ahead of time. Additionally, the consulate will notify your fiance(e) via mail correspondence which they prefer. Attempt to start collecting the required information ahead of time, as it can often take several weeks to collect it all.
3. You will need at a minimum (for the above form) two to three of your most recent pay stubs and a signed letter from your employer listing you job title, start date, your salary, and the status (full-time) of your position. Begin collecting these asap after your NOA2 arrives. You will also probably want to include other evidence such as your banking information and other assets as required by the I-134/I-864.
4. A copy of the NOA2 that you received in the mail.

Is in the guides

I know what he needs to send, my question was I only need that for the interview right? If in fact he is planning to fly to the UK to attend it with me he can bring it with him?

From everything I read there should be 3 copies of everything 1 to send with I-129F, 1 to send to fiance in foreign country, and 1 for petitioner.

He should mail you complete copies, and can bring a copy with him when he travels to be with you.

Redundancy is not a bad thing, helps avoid forgetting anything.