Possible out of date mirrors of security.debian.org

[Alex Brett <alex.brett@loho.co.uk>]

Hi,

From a host on the West Coast of the US security.debian.org resolves to 
the following IPs:

149.20.20.19
128.101.240.215
128.31.0.63
128.61.240.73

Grabbing dists/jessie/updates/InRelease from each of these and looking 
at the Date header, two of them appear to be a few days out of date:
InRelease.128.101.240.215:Date: Sun, 03 Jan 2016 20:01:14 UTC
InRelease.128.31.0.63:Date: Wed, 06 Jan 2016 12:00:52 UTC
InRelease.128.61.240.73:Date: Wed, 06 Jan 2016 12:00:52 UTC
InRelease.149.20.20.19:Date: Sun, 03 Jan 2016 20:01:14 UTC

This has caused me to end up getting some hash sum mismatches by 
grabbing different bits from different IPs etc, so I imagine may be 
causing other people issues as well - is anybody able to resolve this?

Many thanks,
Alex Brett