Sheffield Taxi Group Limited , the leading Taxi Company in City of Sheffield.. Sheffield Taxi Group Limited is the Leading taxi company in the City of Sheffield and operates in every postcode throughout the city including S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, 12. S13, S14, S15, S16, S17 and more. We are a reliable service with friendly staff. Sheffield Taxi Limited, Sheffield Taxis Group Limited, and Sheffield Cab Group Limited are subsidiaries of Sheffield Taxi Group Limited. The company was founded by Miriam Farid and Cash Haleem.