It has the potential to turn into this, which should be the position that both sides should try to avoid as then things will get nasty and bitter in the event of this.
No matter what is being said at the moment the UK just wants a fair, free trade agreement with the EU reflective of our previous contributions and the fact that we operate inline with EU regulations and standards. We fully appreciate we will not receive the level of access that we currently enjoy but feel that a happy medium can be met which ultimately benefits both sides.
In return I fully expect the UK will continue to support the EU, I expect we would still contribute to the EU budget much like countries like Norway does and of course we will pay for all reasonable liabilities upon leaving.