And to be quite enjoying it 

I love the house I rent, ramshackle old cottage with numerous small problems but nothing really terrible. My LL I don't like so much. She's been nothing but a PITA since I first moved in. Turns up whenever she feels like it (despite words from the agents telling her she can't), she is the tightest women I've ever met e.g. A tap on the bath broke, she didn't want to shell out for a set of basic taps so took an old tap from another property and replaced it with that (result: two mismatched old taps that still drip). Every time my contract is up for renewal (yearly) the rent goes up by £75-£100 despite hardly any work being done in the property ever with no reasoning behind the rent rise other than "she can". I've never once missed or been late with the rent, fix things as and when I can etc
Anyway the EPC assessment was done the other day and came back as a G!
As of April next year (when my contract is up) any new property being marketed for rent has to be an E as a minimum.
In order to re market this property she's going to have to shell out thousands to get it up to code. There's no insulation, no double glazing, solid brick which needs insulating outside or inside. All in all it's going to cost her loads to get it up to code...unless she carries on renting to me and doesn't have to 
So AIBU to think that come negotiations next April I can tell her I'm not accepting a rent increase in the knowledge she won't want to shell out to remarket the property?!