Where did you see that SamT? They did used to clearly say that on the website but I haven't been able to find it anywhere recently. Then they changed the application so that you can set an intended travel date for up to 6 months ahead so we've been surmising that this is the new time frame although I hadn't managed to find it anywhere. I haven't looked for a few months though.
Honestly I can't remember and neither can my wife. I feel like we saw it multiple times on various forums, websites and possibly on the application too. We started researching this in December last year so it may have even been on the GOV.UK website. Perhaps if this was an old rule, we may have just been reading through old information and took it as verbatim. We thought it was a ridiculous rule at the time but at the start of this process we had planned everything around it, and now we're here. Hindsight is always great, but we should have checked with the gurus on this forum before going down this path.
Still, they say 98% of applications are processed in 60 days, so we thought we had ourselves covered that way too, but maybe not!
I've seen people mention this before, but is getting an MP involved, just for some clarity so we can make plans, worth it? I think my MP hates me as we've disagreed with each other on a few occasions but is it worth a shot?