14 Way Consumer Unit (Think its 16th Regs)

[Brozart]

Bought this 14 Way Consumer Unit on offer in June for £19.60

It has a 100A Isolator, 80A RCD and 12 X Type B MCBs, would I be able to make this 17th Regs compliant by simply adding another 80A RCD?

 

[Brozart]

In a Wickes near me, in August they had consumer units which were 16th edition & dirt cheap, & further along the shelf were 17th Edition versions on offer for £15.99, a 12 Way Split load consumer unit.

Yeah all the 12 Way Splits were sold out by the time I got there, hence for this thread