Proof Reader and editor needed

UK person preferred.

Are you available to do edit 5 documents - blog posts. These documents have already been written and partially edited. I am taking them from one site to another.
Each documents has these amounts of words approx. :

1:1000 words
2: 400 words
3: 700 words
4: 400 words
5: 450 words

1: I need the content changed from 'I' to the name of a company.
2: I need them to be re proof read and made site ready.
3: I need up to 600 words added in total to make them read better, if need be. That would be 600 words in total. Maybe 100 for one / 200 for another. For example, the post with 400 words may need an additional 200 words added to make it read better / or for a conclusion.
4: Some articles are a bit wordy. I require excess words to be eliminated.
5: Each post will need a conclusion/ finally and key words inserted into it - if they are not there already.

As part of your proposal please edit the paragraph below - there are deliberate errors in it and it is a bit wordy:

And overwhelming majority of pupils do not reach their full potential in maths, but not because they are not ‘good’ at it. Most of the time, they repeatedly underachieve either because they have specials educational needs, bored with the maths at school, can not understand the maths concepts and or have a teacher/ tutor that does not so make it interesting.