Well done but let me tell you nothing is as British as being <em>KNACKERED</em> :-D

<em>Porridge</em> is food

<em>The dog's bollocks</em> is just not right, offensive at many levels

I believe that more British expressions could be things as "<em>easy peasy</em>", "<em>tough as nails</em>" or "<em>cheap as chips</em>" much more didactic, really British and fun to learn for any student

Keep it up!