The company is serving freshly battered cod and chips with peas or mushy peas and tartare sauce on Fridays from 12 noon until 10pm, at a cost of £4.99 with a soft drink and £5.99 with an alcoholic drink.
Fish Club joins the company’s three other weekly food clubs - Curry Club on Thursdays, Steak Club on Tuesdays and Sunday Club.
New dishes have also been added to these club menus. Additions to the steak club menu include a full rack of ribs with BBQ sauce, coleslaw, beer-battered onion rings and chips. New dishes on the Curry Club menu include a poppadum tower and Indian sharer platter.
A new filter coffee offer has also been introduced. It is Lavazza coffee, which is the brand already used by the company.
A spokesman said: “It offers speed of service, which is useful in our busy pubs serving around 30 million cups of coffee a year. It is ideal for people who want black coffee or straightforward white coffee.”
A new menu launched this week features new dishes including peri peri half roast chicken; gourmet hot dog with onion rings and chips and a Tennessee burger.