Addresses differ across credit file (worst offender = electoral)

Jew

I signed up for a free Experian credit-check trial and my credit score is good (almost excellent).

When I spoke to them on the phone, one thing they found was that the addresses connected to my name had several variations accross, for example, bank accounts. Each wrote it in a different format.

Is it important to consolidate them to appear exactly the same?

I haven't signed up for the electoral roll yet, but the agent informed me that the address the council has listed is completely in the wrong format, where the actual flat number is recorded as the building number, and the street name is put as the building name. The building number is not present, and the road is put as the "district".

Should I adapt this (postally wrong) city-council address for my bank accounts? The council has the address listed as:

Street: 50 Forum Apartments
District: Example Street [notice the lack of a number]
City: London
Code: SW1 1AB

Or should just write it as the usual? (Below)

Flat 50
10 Example Street
London
SW1 1AB

Even royal Mail has my address a bit different:

50 Forum Apartments
10 Example Street
London
SW1 1AB

Which one should I adapt?

Writing "50 Forum Apartments" every time I want to buy something online is a bit annoying... instead of simply filling out the "Flat" field with a 50.

On some address searches (for websites when I enter my post code only and they try to match an address by giving a list of all the apartments at this post code) sometimes it says "50 Forum Apartments", sometimes "Flat 50", sometimes "Apartment 50"... where are all these sites getting this different information from?