PIP mandatory reconsideration when PIP letter late

Hi!

Long time lurker, first time poster.

Thanks in part to this site i received my PIP decision this Saturday, 31st Aug 2019.
I noticed the date on the letter is 9th August which gives me only a few days to put my case for a mandatory reconsideration in.
I wish to contest the mobility element, i stated to the assessor that i have to stop for a rest every 5 meters, i illustrated this by pointing to a wall in my home as it was a home visit, my friend has since measured this distance and it is exactly 5 meters.
In the letter i received from them the decision maker has stated that i can walk between 20-50 meters, this is simply untrue!
I have an audio recording and a witness which can both corroborate this.
Is there anything i can do to get me some extra time to put my case as it clearly doesn't take from the 9th-31st August to deliver a letter... i used to be a postman so i know these things!
many thanks in advance...

HI Gordon and Many thanks for the speedy reply.

Yes that all makes perfect sense to me.
I can't even do the 5 meters at 'normal pace' and it would take me MUCH longer than twice the time of a healthy person.
My GP laughed incredulously when i mentioned the mobility element and suggested i should contest this. I scored 10 and so the extra 2 points would take me to the higher rate.
I'll ring them tomorrow as i'm too angry at the moment.
My home is less than 20 miles from the office dealing with this, i know the postal system intimately between here and there and there is no way on this earth that it takes 3 weeks and one day to move a 2nd class letter that distance. In fact it's classed as a 'local' 2nd class letter which is actually a faster route as it travels less distance than a 1st class letter strangely enough.

Again many thanks for your advice

HI Gordon

OK thanks for the information, that would most likely add, AT MOST, an extra week onto the distribution process, even if the walk (PO jargon for delivery route) i live on were to be unavoidably held up for a day (which deliver office managers are loathe to do as it technically counts as 'wilful delay' which is a serious offence) and with a bank holiday factored in too, there's still no way it should take 3 weeks and a day to move a 2nd class letter that distance, not in a million years!

I have a feeling this is going to be more common

I sympathise: last year there was a total mess-up and we were told in September there'd been a backlog and our case hadn't been dealt with yet. Turned out it had been dealt with and sent out in August, but for some reason hadn't arrived. We filed a late request for a MR and gave the misinformation, letter going missing and then re-sent as the reason, and it was all fine.