Was announced on the news today that due to Coronavirus, economic forecasting looks dire around the country, with pay freezes for NHS workers and increases of just 18p per hour to the national living wage rather than the expected 49p per hour increase next April making the new living wage £8.90 an hour rather than the expected £9.21. (
https://www.independent.co.uk/news/uk/politics/rishi-sunak-spending-review-uk-economy-b1761574.html)
Part of the Lewis era strategy of saving on the wage bill (apart from the obvious cuts to the pension plan and streamlining of roles) was introducing 2 year staggered pay reviews, a significant pay increase typically between June and August in the 1st year and a minimal increase the 2nd year between September and October, sometimes with a stinger in the interim (a 16p increase for a downgrade of time and a half rates for sunday/bank holiday premium for example), typically to keep wages as close to the estimated living wage that would be announced just before April the next year and enforced in April.
When the pay review happened for the 30p increase just received in October to £9.30, the higher ups thought that the national living wage would increase in April to £9.21, not £8.90, so with this being the case and the statement from Ken Murphy (the new CEO) being that his strategy is to "maintain momentum" in the business and not to detract from Lewis's strategy, an educated guess on the outlook of the next pay review are for it to be substantially worse than the last one with the justification of Coronaviruses effects on the economy and that they're already paying significantly above the national living wage (by 40p when the next review is announced).
So with this being the case, I think the next review will see another staggered 2 year pay review, the first being a 15p increase to take effect in July/August, An interim increase of 20p per hour in May/June the year after to fund Sunday and Bank holiday premium going to a flat rate and a final increase of 15p in October/November (I would also guess that they would increase night premiums by a few pence as well, despite the bleak outlook, it hasn't had an increase in years.)