The UK is scheduled to leave the EU bloc on 31st Jan 2020. As a British passport holder, will I be entitled/able to continue to use the EU passport lanes in other EU countries after that date whilst the transition period of 21 months lasts? (I fully understand that it is impossible to say what will happen after that period).
Note: I'm aware that Brexit is a controversial topic, and I'm deliberately asking to avoid any debates on the rights, wrongs, merits, fairness, unfairness, etc. of the situation, I'm just seeking practical advice.
Other note: I realise the same question also applies in reverse to EU passport holders travelling to the UK. Feel free to cover that too!
Correction: As pointed out in the comments below, the transition period is 11 months, not 21 months.