NSA and GCHQ joint spying

From the magnitude of data collection done by NSA and GCHQ as analyzed in this article, it looks like if I have accidentally deleted emails years back, I can still recover them from their databases.

It’s remarkable that just one single cable access (NIGELLA in Cornwall) provides almost one tenth of everything NSA collects from internet cables. This also means that besides a large number of small cables accesses, NSA can only have access to just a few more cables with a similar high capacity as FA1 and FEA.