Neil,you well know that electrical theory does not change, in that respect unless you have one very bad case of memory fade you will be fine
Practically you may be a little rusty, working alongside another spark seems like a sensible thing to do, both for your confidence and to become familiar with any important changes that can be highlighted
However,the crux of the matter is that your training and your experience will most likely far exceed what is accepted nowadays in this trade
Try not to underestimate what standard you likely bring to the table
All the best