Given that applications for social housing in the Scottish Borders rose from 582 last year to 817 this year, which is an increase of 40 per cent, will the minister consider—for the whole of Scotland, not just the Borders—introducing the right for local authorities to acquire 20 per cent of development sites purchased by private developers for the provision of affordable housing and requiring that developers who have acquired such zoned land have a time limit for completion of the project?