Company specific tax reliefs
R&D Tax credits
Potentially any company could claim this relief if it undertakes any process which involves something ground breaking and which specifically furthers technological or scientific knowledge. Your company may qualify even if it does not always undertake "R&D" (e.g. design companies or food manufacturers) and the benefit could be enhanced tax deductible expenditure or even cash back from HMRC in certain circumstances.
Land Remediation relief
If your company has had to incur expenditure in cleaning up a contaminated site or certain other hazards, then it may be able to claim this relief which has the benefit of enhancing "£ for £" the amount of tax relief on the amounts spent.