During these unprecedented times, we would like to provide an update on the impact of COVID-19 on our business and the measures we are putting in place to manage the risks.
One of our main focuses in to manage our cash resources very carefully, maintaining liquidity in the business. We currently have over £60 million of unrestricted cash reserves, largely helped by our recent sale of Bleichenhof in Hamburg. Our overall loan-to-value ratio (LTV) stands at approximately 40.7% based on our property valuations at 30 September 2019. When any unrestricted cash is deducted from loans, the LTV stands at 29.6% and our total debt stands at £219.9 million. We have also completed the refinancing of the £28 million loan in relation to our property in Guernsey, Trafalgar Court. This takes affect on 31 March 2020 and has been extended for two years, maturing on 31 March 2022.
Approximately 57% of our portfolio is multi-let industrial estates spread across the UK with more than 850 tenants. Our tenants engage in a variety of businesses and it is too early to say with any accuracy what the impact will be for our occupiers. We appreciate some sectors will be more directly impacted than others and we have written to all our tenants expressing our support and we continue to remain in close contact with them.
In Europe, approximately 18% of our portfolio comprises three daily-needs retail centres in central Berlin, all of which are anchored by strong food retailers, and five retail warehouses in Germany, which are let to a bike and ski business. 3% of our portfolio comprises a rehabilitation medical facility and health club business in Lugano, Switzerland that has been required to close by order of local government, but we are monitoring the position closely. Furthermore, approximately 13% of our portfolio comprises Trafalgar Court, the largest office building in Guernsey predominantly let on a long lease to Northern Trust with more than eight years remaining.
Despite this rapidly evolving situation, we are confident we are well placed to respond to any challenges we may face. We have recently made significant upgrades to our IT infrastructure, carried out over 18 months, meaning that our staff have adapted well to working from home and have continued to collaborate effectively.
Stenprop remains a financially-sound business with a capital structure which is well placed to cope with a prolonged period of uncertainty.