Company officially announced today that there would be redundancies in
the next month.

I currently dont have a mortgage protection policy and noticed that
most of them stipulate a 90/120 day wait period if you're 'aware' of
being made redundant.

I guess if I'm redundant this time around, I've had it even if I start
a policy today but I guess it could be OK for maybe 6 months down the
line.

What exactly counts are being 'aware' of redundancies? Company
announcement that there are going to be, or an official 'at risk'
letter for your position?