Indian companies have been very successful in winning IT contracts from large UK corporate companies in the areas of Banking, Pharmaceuticals and all sectors.  The UK has an established system of visas for what is known as intra company visa.  There is a comprehensive explanation of how to apply for these visa’s for your IT staff who need to work on your contracts in the UK

https://www.gov.uk/tier-2-intracompany-transfer-worker-visa