Shops in london??????????xxxxxxx?

soon ill be going on a school trip to london to the house of commons and after were allowed about 2 hours shopping tome and i was wondering what shops are around that area preferably within 25 mins walking distance, some of my friends want to go to jack wills and abercrombie and fich but i looked on google maps and they are nowhere near eachother so can anyone tell me how far thay are and where is hollister and new look etc thanks x