Installing new Switch gear after 28th Sept but designed before

It used to be the case (or so we were told on the regs course) that if from design to completion was straddling two versions then it was acceptable for the design to be done to version A then Construction (and I & T) should also be done to version A but Construction could be to version B if there were no conflicts (I suppose an example might be such as an RCD connected as per version B requirements but not required under version A requirements) also you could only charge for this with the clients permission unless contracts specifically stated something different. Any requirement at design stage that stated "To current IEE regs etc etc" only referred to requirements at design stage - which on a simple house rewire etc would mean your estimate etc to rewire to current regs for XXX pounds was was the deciding factor as to which regs were current at that time. However if it was during the regs change transition or shortly before that you might be taken to task for not including it or offering the option because you should be aware of this at the time of design (a simple estimate could count as a simple design) . The client quite often could not reasonably be expected to have this information.

We were told that some of the larger (very large)  contracts did indeed straddle a long life-span from conception to completion and the clients should ensure that they have such eventualities written into their contracts regarding variations etc.

I suspect that " Mrs Smith, anytown UK, house rewire to current IEE regs including YYYY for XXXX pounds would often take the simple approach or , if it came to it, a court might decide a fair contract consists of ------. Whereas large firms on large firms both the seller and the buyer should both ensure all possible events with due diligence. You and Mrs Smith might settle on an arm wrestle ending with a pot tea making ceremony on the outcome whereas the big boys decide whether to ask a bloke in a wig to decide.

Of course, I might be wrong about all of that . Plus it appears that things might be a bit different now anyway.

It used to be the case (or so we were told on the regs course) that if from design to completion was straddling two versions then it was acceptable for the design to be done to version A then Construction (and I & T) should also be done to version A but Construction could be to version B if there were no conflicts (I suppose an example might be such as an RCD connected as per version B requirements but not required under version A requirements) also you could only charge for this with the clients permission unless contracts specifically stated something different. Any requirement at design stage that stated "To current IEE regs etc etc" only referred to requirements at design stage - which on a simple house rewire etc would mean your estimate etc to rewire to current regs for XXX pounds was was the deciding factor as to which regs were current at that time. However if it was during the regs change transition or shortly before that you might be taken to task for not including it or offering the option because you should be aware of this at the time of design (a simple estimate could count as a simple design) . The client quite often could not reasonably be expected to have this information.

We were told that some of the larger (very large)  contracts did indeed straddle a long life-span from conception to completion and the clients should ensure that they have such eventualities written into their contracts regarding variations etc.

I suspect that " Mrs Smith, anytown UK, house rewire to current IEE regs including YYYY for XXXX pounds would often take the simple approach or , if it came to it, a court might decide a fair contract consists of ------. Whereas large firms on large firms both the seller and the buyer should both ensure all possible events with due diligence. You and Mrs Smith might settle on an arm wrestle ending with a pot tea making ceremony on the outcome whereas the big boys decide whether to ask a bloke in a wig to decide.

Of course, I might be wrong about all of that . Plus it appears that things might be a bit different now anyway.