I hope that you're not an umpire, DaftGrandad!
The bowlers front foot can go beyond the batting crease (as you've called it - the rules actually refer to it as the 'popping crease'). The only requirement is that PART of his foot, WHETHER GROUNDED OR RAISED, must remain behind the crease. So he can have his toe over the crease (with no other part of his boot in contact with the ground at all) but, as long as his raised heel is still behind the popping crease, it's a legal delivery.
Further, what's this bit in your post about the bowler's whole body being outside the return crease? If the bowler's back foot as much as touches the return crease, it's a No Ball. That's considerably different to what you've written!
Chris