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Im married with my wife who is a lithuania citizen and my children who hold lithuania passport.
I have EU resident card of family member of EU Natiol issued in UK.
we intend to travel together to Lithuania to meet her family.
Do i need to apply for Visa to travel with my family despite im in possession of resident card of FM of EU national issued in UK
Thanks

You mean a visa to re-enter the UK or a visa to enter Lithuania?

If you have a residence card you can leave and enter the UK at any time, with or without your partner. Take the UK/EEA immigration queue when you re-enter the UK.

For Lithuania, in theory, you do not need a visa if you are travelling with your wife. I am not sure how that works in practice. I am the non-EEA partner of an EU citizen and my passport always gets stamped when I enter her country! It does not really affect me, so I never questioned the border officers...

Perhaps take a print out of the regulations and a copy of your marriage certificate to be on the safe side?

https://europa.eu/youreurope/citizens/t ... dex_en.htm
"Holders of an EU family member's residence card don't need to obtain a visa if travelling with an EU national"