T
The Ghost
It is likely from what you say that between the two of you, you could hack your way through on the installation. You are suggesting with the aid of up to date electricians on this forum what could possibly go wrong? Well don't forget your question was is my electrics safe? Well, from what you describe, and answers here confirm, no they are not! To make your electrics safe you will need to have people working on it who are safe! Clearly you are concerned that your installation will be safe including additions you are proposing. If you pan back for a moment, your granny wants a house re-wire and you send in two guys who have experience and knowledge which is now out-dated on the basis they can do the wiring just not up to date? Do you want to live in a house that is not up to scratch electrically. Knowing @Pete999 from posts I generally find him genial and non-offensive with sound advice. To be fair to him I believe he has not taken offence merely advised you not to undertake such a project yourself. I must say in principle I agree with him. Although you say you have done electrical training and your Father is an experienced electrician there is an inconsistency in your questions. If there is the expertise you suggest then the questions you are asking belie that experience. Again I think @Pete999 and other electricians would be loathe to "walk" you through this not least because of the inconsistency of questions (very inexperienced) against experience (why then don't you know the answers?), but also I and others will be concerned for your safety on the job and in the future, and would not want to be the person who advised you and harm resulted from that. I hope you understand that and re-read what was said to you. You are asking for advice, if you don't like the advice at least don't shoot the messenger. Now...can we be friends?
EDIT: just seen your post to Pete
EDIT: just seen your post to Pete