yes my letter is written out,
@phi1 - it isnt a big workplace so i have no manager, just the owner and his sister, im not leaving on bad terms and i beleive i have taken their bike shop business as far as i can with the resources availble hence the move on....
this is why its harder i think as its a fmaily business so no on ehas left for years...
Well hand it to the owner, I am sure they will understand. People always need to move on in there life.

im not dropping him in it, im giving him what i believed was the correct amount, it turn out im 4 weeks notice so this is what i ll be doing. I had no intentions of dropping him in it but at the end of the day, you work for yourself and your family, not to line the pockets of the owners.
EDIT - i just recieved a copy of my contract and there is no mention of notice period so how do i progress forward now?
Notice you must give your employer
If you have worked for your employer for one month or more, the legal minimum amount of notice you must give is one week.
Normally your employment contract will set out a longer notice period. If it does, you should give this length of notice to your employer.
If your employment contract does not set out a notice period you should give a reasonable period of notice to your employer. This is included in your employment contract as what is known as an ‘implied term’. What is 'reasonable' will depend on your seniority and how long you have worked there.