[dagw]

If you want to "gamble" its the best option

The national lottery has an expected return of roughly 50% of your bet. They give about 30% of your bet to charity. So if you gamble £100, you'll end up with £50 in your pocket and £30 donated to charity.

Blackjack on the other hand returns roughly 90% of your bets over time if you play well. So if you donate £40 to charity and take the remaining £60 to a blackjack table you'll end up with more money going to charity and with more money in your pocket.

[mlyle]

> take the remaining £60 to a blackjack table

Of course, "take the remaining 60 pounds" is ill-posed; what does that mean, make 60 bets of 1 pound and stop? Play a single 60 pound bet hand? Because that's the conditions under which you could expect to bring 60 and typically leave with ~54.

If you show up with 60 pounds but bet well over 60 cumulatively you're going to end up with much less.