I've just had my water bill through from Severn Trent (I pay twice-yearly) and the charges for both water and wastewater has gone up over 43% and 30% respectively! 
It's not like I can change suppliers and as far as I can tell I've not even had an e-mail warning me of this increase (unless its in small print on a junk e-mail somewhere)
As far as rationale goes it says "Severn Trent is under-taking one of our biggest ever investments in our infrastructure that serves you, your community and the environment around us. To do this, we need to gradually increase bills over the next five years. Your bills are currently among the lowest in England – a position we want to continue" - could it be more vague??
In reality I think I'd have more respect for them if they simply said "Yeah, we want to make more profit"
*rant over*

It's not like I can change suppliers and as far as I can tell I've not even had an e-mail warning me of this increase (unless its in small print on a junk e-mail somewhere)
As far as rationale goes it says "Severn Trent is under-taking one of our biggest ever investments in our infrastructure that serves you, your community and the environment around us. To do this, we need to gradually increase bills over the next five years. Your bills are currently among the lowest in England – a position we want to continue" - could it be more vague??
In reality I think I'd have more respect for them if they simply said "Yeah, we want to make more profit"
*rant over*