By William James LONDON (Reuters) – Britain will on Monday outline a new, interventionist approach to balancing its heavily services-based economy for the post-Brexit era, seeking to reinvigorate industrial production and stimulate investment in technology and R&D. Unveiling her long-awaited 'Modern Industrial Strategy', Prime Minister Theresa May will demand closer collaboration within key industries in exchange for government support on regulation, trade and research. May will ask businesses to work together to tackle industry-specific challenges, citing examples of successful collaboration that have helped attract overseas investment from the likes of carmaker Nissan , and enabled aerospace firms such as BAE Systems to develop a competitive edge.