mySQL - Should I denormalise?

Question

Overview (Sorry its vague - I think if I went into more detail it would just over complicate things)

I have three tables, table one contain

Answer 1

As its a one (Table 1) to many (Table 2), with another one (table 2) to many (Table 3) I would keep the same structure as their seems to be 3 layers there.

e.g.

• Table 1
  • Table 2
    • Table 3

Also, a lot will depend on what additional fields you are storing within those tables.