My sons (16 and 18) are elite level lawn bowlers and for the past year and 1/2 have had a sponsorship deal with the Aero Bowls company, who have provided them with gear, bowls and accessories during this time. I recently emailed them to get some new gear as per their contract with us and they have stated that they "will not be continuing a formal sponsorship" with the boys. My problem lies in that I cannot find the original signed documents (although I have the contracts as emailed to me) as I have moved house 3 times since. Their contracts were for 3 years. I do however have proof that the company have honored the sponsorship agreement up until this point, and regular correspondence emails. Do I have any legal leg to stand on for this breach of contract without the original signed documents?