What do the Westend Retail Park in Blanchardstown and new Dublin buildings totalling 700 buy-to-lets and 1,000 student rooms have in common? The answer is to be found in Frankfurt, where German investment firm DWS has recently ramped up a €700 million Irish buying spree and become the latest landlord to sue Irish retail tenants hit by Covid-19 restrictions. DWS is an 80 per cent subsidiary of German financial giant Deutsche Bank with €759 billion in assets under management and over 3,000 employees worldwide. In the past year alone, its property funds have struck deals worth in excess of half a…