Hi Ron
The round tube in the front is plenty strong enough to be used to jack up the front.
As regards the rear, I think the safest way to jack it up is to do it in front of the engine. I know you will be lifting the entire car that way (at least if you are doing one side at a time), but I don't personally consider the rear end strong enough to take a jack.
That said, however, we didn't see any signs of deformations when we dismantled the 2.2 at Waldo's last month and lifted the rear in this (quite brutal) way: