Royal Mail poised to replace Renishaw in return to FTSE 100 Wed, 26th May 2021 07:28 (Alliance News) -Â FTSE Russell late Tuesday indicated that, ahead of next week's quarterly UK index review, Royal Mail PLC could re-join the FTSE 100, replacing up-for-sale Renishaw PLC. Based on data from Friday last week, FTSE Russell said that Royal Mail could rise back into the FTSE 100 index in the review to be unveiled after the market close next Wednesday. Royal Mail dropped out of the blue-chip index for a second time in December 2018, and has remained in the mid-cap FTSE 250 ever since. Meanwhile, Renishaw could drop out of the large-cap index.