My uni didn't turn on the heating on Mondays at all. When I went there to study in the library (I learn there better than at home) I was always wearing a Parka.

My uni didn't turn on the heating on Mondays at all. When I went there to study in the library (I learn there better than at home) I was always wearing a Parka. Also, the gas price of my dad increased from 4.8 cents per kWh to 14.2 cents per kWh as an existing customer. People who were moving at the time and were new customers had to sign contracts well above 20 cents per kWh. So, you probably only didn't "notice any difference" if you have either deep pockets or your energy supplier has a very foresighted buying strategy for a period of more than 1.5 years. (Many utility providers don't do this because they are speculators at the same time. Few like to pay a premium for forward contracts in the far future).