Is it Tesco plc service sector?

Yes they are at a number of levels.

Exaample would include

financial, insurance, real estate/estate agencies and business services

- transport, storage and communications services

- commerce (retail and wholesale trade)

- community, social and personal services (exclude domestic workers)

- hotels

- restaurants, coffee shops, food sector and other approved food establishments

- despatch and delivery services

- hair-dressing and beauty shops

The main sectors that Tesco falls in to are bolded for you