I was thinking of going to London for a weekend in December, but I heard that after Brexit the rules changed. My passport is expired and I don't have time to renew it before the trip. Will my Portuguese ID card be enough or do I absolutely need a passport?
Actually, your ID card alone isn't enough to enter the UK anymore - since Brexit, the British stopped accepting EU identity documents without a visa, and they only recognize valid passports. Since yours is expired, you really do need to renew it before December, there's no way around it. The good news is that in Portugal passport renewal is usually pretty quick if you go in person to a Loja do Cidadão counter - check the online scheduling because sometimes the waiting times are shorter than they seem.
I've traveled to London with my ID card a while back and it went smoothly, but after Brexit that changed - now you need a valid passport even to enter the UK, the ID card doesn't work anymore. if your passport is expired you really need to renew it beforehand, there's no way around it, they're really strict about it now.
Have you checked the official UK Visas and Immigration website? After Brexit, the citizen card doesn't work anymore to enter the United Kingdom - you need a valid passport, it's mandatory. If yours is expired and you're traveling in December, I think it'll be tough to get it renewed in time because SEF offices tend to get swamped that time of year, but it's worth trying to do it urgently anyway. Some travel agencies can speed up the process, so maybe it's worth contacting an agent or calling SEF to see if there are any quick options available.
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