This is not really a data issue, rather a heads up against potential hacks. I see there is a company, now dissolved, number 08804157, whose name (without escape characters) is:
SAFDASD & SFSAF \' SFDAASF\" LTD
It is fairly safe to say that this company never did any real business! What they may have been trying to do is crash your system by using the escaped backslash and double-quote characters.