Most seem pretty good sites to me
https://www.intugroup.co.uk/en/our-centres/
There was a commentator on Radio 4 earlier - she made the point that indoor sites which were at a premium in the past to high street locations (think British weather) are reversed now, due to higher Covid-19 risks.
Based on the quality of the sites, I reckon the administrators won't have a problem shifting most of them, albeit at a hefty discount from what they were worth back in March. I can see longer-term investors like the Duke of Westminster's Grosvenor Estates being interested.