Does anyone know what time the cut off point is for posting something to be guaranteed Next Day delivery?? xx

i know my neighbour went to post office on friday at around 2 oclock to post me something while i was away and it did arrive next day ,,, 200 miles away ,,
that give you any hope? x

think it 5pm.... not sure why i think it
there is a sign in our post office saying to be in the door before 5 for passports, car tax and im sure special delivery post
http://www2.postoffice.co.uk/letters-parcels/sending-uk-letters-parcels/special-delivery

didnt see anything about Posting by times....

I posted something to Luke in London the other week at 5pm and it arrived the next day

It might depend on which post office you go to and when they get their stuff picked up. I know in the post office in our old village you had to get there really early, as postman came at 4pm to collect but if i went to the big post office in next town you could send things up till 7pm

It all depends on their collection time. and if you want by 9am, 1pm or just next day