jeupsy wrote:You either need a visa or an EEA family permit.

Both are free of charge and will be easy to obtain as the family member of an EU citizen.

Thank you for your answer,but can I get it in uk airport on arrive?

Hi ,I have a stamp4 Ireland and want to go to London for the weekend with my family,my wife and two sons have Irish passport all,do I need a visa? Thank you for your help.