FYI, I have also filed online for the past 2 years, declaring rental income and stock units that are still being apportioned for UK tax. I use a 'correspondence address in the UK' for the filing and the online forms have my Swiss address somewhere on them. I think this was setup when I sent in a P85 to declare that I was leaving the UK.
This year my refund was paid in a week or so. Last year, the submission was randomly selected for 'checking', but no-one contacted me and it was paid a month later.
Though I noticed the 'I am a UK resident' on the declaration, I will file online until they tell me otherwise...