We offer many services under the umbrella of each of these categories as well – if it’s a plumbing issue you have we have the tools and the expertise to solve your issue and do so the same day you call us! Holding tank cleaner/treatment. Are you up for the b&m challenge? You’ll usually need gcses (or equivalent) at grades to (a* to c) in maths, english and science. We use cobol now only if we're linking to legacy systems: %. Don has helped.