think you must have printed the wrong form,when you fill it in online it does ask on form for address and postcode .

You don't need all that. We took our handwritten forms up to Victoria office with our passports and had them sent back six days later. No problems. For one address abroad we just wrote 'The manager' and name of hotel and resort - no postcodes no telephone numbers - and in the second on we just wrote 'British Embassy' - no address, postcode or phone number. Don't worry no-one is trying to catch you out. The guy in the office in London was most helpful and people were just coming in and being given forms to fill out there and then, no need to do any of it on-line.