That's useless.

As long as the UK is EU member there can not be any negotiations with 3rd party countries, which of course also applies to Switzerland. Full stop. The only conclusion is that at most there have been, and will be until Brexit has happened, informal talks but that's just that, informal and of course completely non-binding.

So what you have so far is the Swiss position. But keeping the status quo runs counter to UK's demand to control immigration so obviuosly the regime will change. That in turn means one doesn't know what rules will apply post-Brexit.

Heck, you don't even know whether the UK will stay true to what has been agreed to under the Bilaterale, in particular that people will keep rights they already acquired under the Bilaterale!