Which sounds like a recipe for a vicious spiral ...
One mall near to us has over 1 in 4 units empty. Presumably they have to recover the same money from fewer tenants, so put the rents up for them. They can't afford and move (or go under).
Rinse and repeat.
Really it's (Kingfisher in Redditch) a microcosm of the country.
Since 2005:
Alders - went bust. Of a 3 storey unit, ground floor (finally) let to Primark. 1st and basement unlet. Woolworths - went bust. Unit was empty for 2 years before Superdrug moved in.
Unlet (presently empty) units Jessops - gone Past Times - gone Millets -gone Peacocks - gone T.J. Hughes (2 storey unit) - gone Julian Graves - gone. Textiles direct - gone Clarks - closed that branch
Plus another 6 or 7 units that have been unused for years
All that's left are card shops, and mobile phone shops ....