LONDON & AMSTERDAM--(BUSINESS WIRE)--TelecityGroup plc (“TelecityGroup”), a provider of data centres in Europe, and Interxion Holding N.V. (“Interxion”) (NYSE: INXN), a European provider of data centre services, today announced that discussions relating to their proposed all-share merger remain ongoing and the companies continue to make good progress towards completing mutual due diligence and finalising definitive transaction documentation reflecting the agreed transaction terms as announced o