I am sure you will get some sound advice on here, but first you would need to tell people a little about yourself and your motives for the trip as different approaches will be required. For example,
How much cycling do you do at present, miles per week?
What is the furthest distance you have cycled in one day in the past year?
Do you intend camping/hostelling/hotels or B&B along the way?
Any thoughts on how you will get to/from LE or JoG?
Are you happy to cycle on the shortest route which may involve dual carriageways, or would you prefer to go on side roads even although that will add to your mileage?
Do you have any 'must see' places between LE and JoG?
What about available time scale?
What kind of bike do you have or intend to use?
Don't tell me you are going to have back up from a motor vehicle because I will not be able to help you anymore if you do.

