Negative.
Insurance, since it pays 2 to 1, would be a break-even proposition if the dealer had a
BJ under an ace 33% of the time. But the dealer only has a
BJ around 31% of the time. The house edge on insurance is bigger than it is for the rest of the game of blackjack if you stick to basic strategy.
A lot of players will "insure a good hand" when they get a 20. But this is an incorrect move. In fact, since the dealer needs a 10 to get a
BJ, and you have two of them, you just reduced the dealer's chances slightly of having a natural!.
The only time it's a right move to take insurance is when you're counting cards, and you know there is an excess of 10s in the deck. Now, you say that ladbrokes is live dealer, so that probably does mean that some degree of card counting is possible, but my understanding is that they don't deal too far into the shoe with those games, so it's unlikely.