June 21 (Reuters) - The following are the top stories on the business pages of British newspapers. Reuters has not verified these stories and does not vouch for their accuracy.

The Times

- The board of Morrisons will seek assurances from any buyer on the future of its workforce, manufacturing and pensions as the Bradford-based supermarket group prepares for rival bid approaches. https://bit.ly/3qbuQaC

- The activist investor that has bought a big stake in Aviva has defended its approach to overhauling companies days after calling on the FTSE 100 insurer to hand billions to shareholders. https://bit.ly/3cT7EZ9

The Guardian

- UK cabinet ministers including Rishi Sunak will this week urge Boris Johnson not to keep sidelining his ministers, as officials warn of a difficult autumn ahead with pressures over hospital waiting lists, social care reform and court backlogs. https://bit.ly/3gKdu1D

- The UK government's chief scientific adviser, Sir Patrick Vallance, has been asked by Boris Johnson to investigate whether the UK's successful vaccine procurement programme can be replicated in other areas of technology. https://bit.ly/3vGe7gJ

The Telegraph

- Facebook has urged UK ministers to reverse a ban on junk food advertising over fears it will scupper the social media accounts of thousands of small businesses. https://bit.ly/3qaeOOk

- UK Treasury officials are drawing up plans for a pensions tax raid in the autumn to help pay for heightened public spending during the Covid pandemic, The Telegraph reported. https://bit.ly/3vLq0lD

Sky News

- Snapchat, YouTube, TikTok and Reddit are involved in a new campaign encouraging more young people to get their coronavirus jab as the social networks have teamed up with the UK government. https://bit.ly/3wLdl3h

- Andrew Tinkler, the former Stobart Group chief, is preparing to mount a public company comeback with a deal to rescue NMCN, the London-listed infrastructure services provider. https://bit.ly/3vKUaW9

(Compiled by Bengaluru newsroom)