Upvote:2
Yes, as long as your visa will be valid on your scheduled time of arrival in the UK you are fine. Why would you not be able to travel on the same date as the first date of your visa validity? Its fine.
You can't tell the airline check-in staff hey I will reach there just 1 hour before my visa validity please let me board: that's a no no in most cases. But in your case you are scheduled to reach 2.5 hours into your visa's validity; Forsee no problems with boarding.