Apparantly its up to the electrician to decide?
Well - you want to be the electrician in this case, so you are the one to decide.
Well put. One can't DIY without having the knowledge required. The point is portable appliances like your TV can't rely on the fuse in the plug or supply MCB's and if the manufacturer decides it needs a 2A fuse he must include it in the TV.
But once we move to fixed appliances then the manufacturer can and in many cases does stipulate what protection is required. He can stipulate semi-conductor fuses, MCB's, motor overloads and the installer has to provide them. And the commissioning engineer will check they are in place.
If you want to DIY then that will include filling in an
insulation certificate??? where you sign for the design, installation, and inspection and testing. You can employ someone to do one or more of those functions but you can't write in design "As advised on a forum" you must have some one to visit and sign the form. The completed form you will give to LABC who if they don't believe what is written down can re-test any items. So they don't do testing for you they verify your results. Some LABC will test for you at an extra charge.
If you were doing a full house re-wire then to buy or hire test equipment may be worth while. But in real terms the option to DIY and involve the LABC is not really for Joe Public but for people like me who have a full test set know exactly what they are doing but are not a member of a scheme.
Putting it bluntly the job is too small to be worth doing as a DIY.