Can I change my travel plans or intended date of arrival after getting UK visit visa ? Will there be problem at immigration? I mentioned in my application that I want to visit my brother in mid week of March but now I want to delay it for a month .
Changing the date of your trip shouldn’t be a problem providing the new timeframe is within your visa validity - plans change, after all. If you submitted an invitation letter from your brother with your application, you could have him send you an email with the new dates and a reference to why the plan changed, so that you have something to show Immigration in the UK if asked. Changing the length of your trip could cause you a problem if it’s a significant change eg 2 weeks to 2 months Cancelled UK visa on entry