“We need more information about you” - what happens if I’m unable to provide said information?

[Xenolith]

So I received an email detailing the fact that since I’ve received a certain threshold of money within a year that I need to provide more information for verification. Unfortunately I can’t provide a proof of identification as my new passport won’t be ready until 10 weeks time though I’ve provided a proof of address through a bank statement. Is anything going to happen to my account so long as I’ve yet to provide all the information required?

[kernowlass]

@Xenolith 

If you don't submit something you risk your account being limited.

We accept copies of the following documents as proof of identity:

• Your ID card
• Your driver’s license (the plastic card, not the official letter)
• Your Passport
• Other photo ID issued by a government body

[Xenolith]

So I’ve sent them both a Proof of Address (which seems to been accepted) and a Proof of Identification but the latter has been rejected due to it being expired, which was my passport. So basically I have to provide a current POI that’s not expired? Also what exactly are the limitations to my account and how long until they come into action?