Black Kat SEO is a company that specializes in SEO that is getting your web site on to the front page of Google.
If that interests you simply DM them on Twitter @BlackKatSEO
They usually charge a one off fee of £300 and a monthly retainer of £150 but for @EDCEssex Business to Business Members they will do a package:-
Set Up fee £200.00
Monthly fee £75.00
to be reviewed after three months they expect to have made so much improvement in your positioning that you will retain them.
Depending on your business they would hope to be able to continue the work at £75.00 per month. This will get you on the first page of Google and exposure on all kinds of digital media.