My favorite thing for a quick meal is potato onion Mrs. T's pierogies with chopped turkey bacon sprinkled on top with a bit of butter, salt, and pepper. I'm thinking that's will I'll have tonight. Mmmmmm!!!!!!!
Guessing I won't be getting any pierogies in England. 
~Liza
I found some Polish foods online for my Polish colleague- you might find some here!
Restaurants and Bars
Daquise
20 Thurloe Street, London SW7 2LT, Tel. 0207 589 6117
Café and restaurant, outside South Kensington tube station.
Ognisko Polskie
55 Princes Gate, London SW7 9PN, Tel. 0207 589 4635
Wodka Restaurant
12 St. Alban's Grove London W8, Tel. 0207 937 6513
Polanka
Polish Delicatessen, Sandwich Bar and Restaurant
258 King Street, Hammersmith, London W6 0SP Tel. 0208 741 8268
Na Zdrowie
11 Little Turnstile Street, Holborn London WC1V 7DX Tel. 0207 831 9679
Bar and café. Large selection of Polish vodkas and beers.
Shops
Food Stores
Korona
30 Streatham High Road, Streatham London SW16
Continental Delicatessen.
Good selection of Polish meats, sausages, pickles, vodkas, cakes, confectionery and cooking ingredients.
Polanka
258 King Street, Hammersmith, London W6 0SP, Tel. 0208 741 8268
Open 10am-10pm Monday to Saturday and 11am- 8pm on Sundays.
Polish food shop, offering good selection of meats and sausages, pickles, cakes and confectionery.
A restaurant at the back is nicely decorated in Polish wooden country style and offers comforting, filling food at reasonable prices.