It’s been a few years since Ernst & Young moved into its shiny HQ at More London next to the mayor’s office on the south bank.

In 2010, 6,000 PricewaterhouseCoopers staff will join them.

A year earlier KPMG will take up a £260m, 999-year lease on offices in Canary Wharf.

And only last month BDO Stoy Hayward all but completed its move into new offices on Baker Street – all the way from No. 8 to No. 55.

I read now that two firms in Manchester are set to join in the merry-go-round.

PriceWaterhouseCoopers is apparently looking at 3 Hardman Square, while BDO is also looking to move.

The relative increases in square footage are interesting and perhaps indicate something more significant. According to Cairns, PwC is looking to up its tenancy from 40,000 sq ft to 70,000 sq ft. BDO’s ambitions are more impressive: it’s looking to increase its occupation from 20,000 sq ft of space in Commercial Buildings on Cross Street to 60,000 sq ft. A threefold increase, no less.

I do wonder whether this will be the last round of moves of this kind. I get the sense that for many people-heavy industries like professional services, home-working will become more of a default position than a staff ‘benefit’.