Tim091 is on the money there. On the opposite side of the coin the main issue with an ISPs email service (or any popular email service for that matter) is that they often find that huge numbers of cus ...
Your worried about a minor blip with gmail (everything was restored, affected something like 0.03% of their users anyway) compared to the Orange service? I don't think you have much to worry about the ...
You could just sign up for a different email account that supports push like gmail, you don't need a pointless £5 bolt on to support it. Why on earth would you want an Orange email account anyway?!