In my opinion UK will get similar deal to Switzerland. I would not base my forecasts on short term fluctuations in GBP or in assumptions that migration will decrease. Both will depend on actual deal UK will get with EU and I'm quite sure this deal will be a win-win for both. Because both EU and UK will get better by continuing to trade together than not to. UK is a major consumer for EU market and this won't change - and it's in EU best interest to make sure this won't change.