More woe for postmark collectors, with no-notice postmark for Children's Stamp Competition

The people involved must be very honoured, but it's not much good for collectors.  Having used special slogan postmarks for the 11 Doctor Whos, and the 11 Football Legends, Royal Mail has now used similar postmarks for the finalists in their Design a Christmas Stamp Childrens Competition.
When the short list of 24 designs was announced, Royal Mail included this statement:

"To celebrate the children being the 24 finalists, their achievement will appear on a special postmark that will feature on mail delivered to addresses nationwide. Each postmark will feature one day over the next month. Two of the national finalists are from Wales and will have a Welsh postmark sent to addresses in Wales."

To avoid making this blog entry too big, the remaining postmarks will be shown on a new one here; the table at the foot will continue to be updated. 

Apparently the campaign started on 3 October, with each postmark being in use for one day only (at least that is the plan, but see the detail below), running up to the announcement of the two winners on 31 October, and the issuing of the stamps on 5 November.
Latest text additions will be in blue; images will be slotted in more or less in order.

Thanks to John G and John A we can show these examples. 
Natacha Simpson from Wandsworth 4 October, Molly Robson from Horsham 3 October

ADDED from contributions - thanks to Bob M, Dominic P, Boweevil, John G, John C, Mike C, 
(apologies to anybody not credited!)

4 / 5 October Natasha Simpson from Wandsworth used on a second day (Bath, Bristol Taunton MC and Greenford/Windsor MC) 
8 October Olivia Heller from Royal Tunbridge Wells from Romford MC with a clear (wrong) date (Thanks JE)
9 October Adil Hanney from Blackburn (Cornwall = Truro MC)
9 October Tia Dann, from Bamber Bridge on a Post and Go stamp so mostly illegible (Nottingham MC) and from Bath, Bristol Taunton on 8 October
10 October Nial Conn from Armagh - Chester and N Wales MC
11 October Corin McCrea from Holywood - S W Wales MC and on 12th from South East Anglia MC (thanks KC)
14 October Faye Hughes from Darlington  Cambridge MC
15 October Rowan McAlpine from Berwick-upon-Tweed, at Manchester MC 
16 October Finn Alexander from Taunton, at North and West Yorkshire MC 
17 October Rosie Hargreaves from Devon, at North and West Yorkshire MC, and South East Anglia MC
18 October Archie Hilton from Banchory, at Cambridge MC (I've also been sent examples from Bath Bristol Taunton MC, S W Wales MC and Chester and N Wales (both in English) on the same date; and Chester and N Wales and Gatwick MC on 19th.

However, the finalists in Wales seem to have drawn the short straw, both being named on one postmark with no precise location, but that postmark has been used (unless there was a machine error) on 11 October and 18 October at Cambridge MC
Jayden Robens and Nicole Murphy from Wales (og Cymru)  

UPDATE 10 October:  Collectors with more knowledge than I have - and who have seen examples - have said  that, unlike the previous two campaigns, these slogans are being applied on all IMP-processed mail to any address nationwide. That should mean that we all see some, although it's hit and miss given the amount of mail that comes through with no postmark at all!

Fortunately the British Postmark Society will collate reports and publish the full results, but they still need help from all of us, not just from their members, so please send scans of any examples you see.

UPDATED 21 October. We now have a list from Royal Mail of all the finalists, locations named on the slogans, and dates.  What you have found, however, is that some slogans have been used on more than one date, not always the expected ones.  § Friday dates seem to continue to Saturday (4/5, 11/12, 18/19, 25/26)

Region	Location	Name	intended date	Actual dates
South East	Horsham	Molly Robson	3 October	3 October
South East	Royal Tunbridge Wells	Olivia Heller	7 October	8 October
North West	Bamber Bridge	Tia Dann	8 October	8 October 9 Oct @ NG
North West	Blackburn	Adil Hanney	9 October	9 October
Northern Ireland	Holywood	Corin McCrea	11 October §	11 October
Northern Ireland	Armagh	Niall Conn	10 October	10 October
North East	Darlington	Faye Hughes	14 October	14 October
North East	Berwick-upon-Tweed	Rowan McAlpine	15 October	15 October
South West	Devon	Rosie Hargreaves	17 October	17 October
South West	Taunton	Finn Alexander	16 October	16 October
Scotland	Banchory	Archie Hilton	18 October §	18 -19  October
Scotland	Newtown St Boswells	Danielle Lockie	21 October	21 October
Yorkshire and Humberside	Sheffield	Kristina Pavic	22 October	22 October
Yorkshire and Humberside	Hull	Thomas Donaldson	23 October	23 October
London	Rainham	Daniel Payne	24 October	24 October
London	Wandsworth	Natacha Simpson	4 October §	4-5 October
East of England	Chelmsford	Thomas Gaynham	25 October §	25 October
East of England	Norwich	Ava Reynolds	28 October	28 October 29 Oct @ NG
West Midlands	Oswestry	Oliver Miller	31 October
West Midlands	Newcastle-under-Lyme	Fred Egerton	1 November
East Midlands	Newark	Morgan Spink	30 October
East Midlands	Derby	Ethan Mahal	29 October	29 October
Wales		Jayden Roberts Nicole Murphy	Oct 3-17 in English Oct 18 – Nov 4 in Welsh	11 October (E) 18 October (W)
Wales