Exhibit 99.1

TATA MOTORS LIMITED

Bombay House

24, Homi Mody Street,

Mumbai 400 001, Maharashtra, India

Update on plant operations of Jaguar Land Rover UK (“JLR” “Company’s Wholly Owned Subsidiary”)

Mumbai, April 22, 2021:Pursuant to Regulation 30(11) of the SEBI (Listing Obligations and Disclosure Requirements) regulations, 2015, we would like to state that the Company’s wholly owned subsidiary – Jaguar Land Rover UK, like other automotive manufacturers, is currently experiencing some Covid-19 supply chain disruption, including the global availability of semi-conductors, which is having an impact on its production schedules and ability to meet global demand for some of their vehicles.

As a result, JLR have adjusted production schedules for certain vehicles which means that the Castle Bromwich and Halewood manufacturing plants will be operating a limited period of non-production from Monday, April 26, 2021. Manufacturing continues at the Solihull plant.

JLR is working closely with affected suppliers to resolve the issues and minimise the impact on customer orders wherever possible.

This is for the information of the exchange and the members.

About Tata Motors

Tata Motors Limited (NYSE: TTM; BSE: 500570 and 570001; NSE: TATAMOTORS and TATAMTRDVR), a USD 35 billion organisation, is a leading global automobile manufacturer of cars, utility vehicles, pick-ups, trucks and buses. Part of the USD 113 billion Tata group, Tata Motors is India’s largest and the only OEM offering extensive range of integrated, smart and e-mobility solutions. It has operations in India, the UK, South Korea, Thailand, South Africa, and Indonesia through a strong global network of 103 subsidiaries, 10 associate companies, 3 joint ventures and 2 joint operations as on March 31, 2020.

With a focus on engineering and tech enabled automotive solutions catering to the future of mobility, Tata Motors is India’s market leader in commercial vehicles and amongst the top four in the passenger vehicles market. With ‘Connecting Aspirations’ at the core of its brand promise, the company’s innovation efforts are focused to develop pioneering technologies that are sustainable as well as suited to evolving aspirations of the market and the customers. Tata Motors strives to bring new products that fire the imagination of GenNext customers, fueled by state of the art design and R&D centers located in India, UK, US, Italy and South Korea. Internationally, Tata commercial and passenger vehicles are marketed in countries, spread across Africa, the Middle East, South Asia, South East Asia, South America, Australia, CIS, and Russia.

To know more, please visit (www.tatamotors.com; also follow us on Twitter: https://twitter.com/TataMotors)

Media Contact Information:

Tata Motors Corporate Communications: +91 22-66657613 /

indiacorpcomm@tatamotors.com

Safe Harbor: Statements included herein may constitute "forward-looking statements". Forward-looking statements are based on expectations, forecasts and assumptions by management and involve risks, uncertainties, and other factors that may cause our actual results, performance or achievements to materially differ from those stated. We cannot be certain that any expectation, forecast or assumption made by management in preparing these forward-looking statements will prove accurate, or that any projection will be realized. More detailed information about these and other factors that could affect future results is contained in our annual reports and filings with the Securities and Exchange Commission. Our forward-looking statements pertain to the date of their initial issuance, and we do not undertake to publicly update or revise any forward-looking statement, whether as a result of new information, future events or otherwise.