Friendly dog lover with spare time!

I have always grown up with dogs (bearded collies, westies, cockapoo) and now I have my first job in London I am really missing my time walking and cuddling with dogs. I’m an all round animal lover and have experience with dogs of all sizes, ages (and manners..!). I live in a flat so could only do overnight if it is a small dog or, alternatively I am open to sitting in your home (I lived in America for a year whilst a lovely couple house and dog-sat my family home, so am familiar with this type of arrangement). I work 9-5 in Waterloo at an environmental charity, so can mostly do evenings/early mornings and weekends :)