Slightly puzzled about why the GWR haters have yet to pop up demanding that Chiltern's management team should be fired after this litany of cancellations due to crew shortages today...
From
http://www.firstgreatwestern.info/coffeeshop/index.php?topic=18624.0
09:43 London Marylebone to Banbury due 11:02
11:43 Banbury to London Marylebone due 13:07
14:57 London Marylebone to Aylesbury Vale Parkway due 16:03
15:32 Leamington Spa to Stratford-Upon-Avon due 16:08
16:13 Aylesbury Vale Parkway to London Marylebone due 17:20
16:29 Aylesbury to London Marylebone due 17:36
16:41 Stratford-Upon-Avon to Leamington Spa due 17:17
16:48 Aylesbury to London Marylebone due 17:50
18:06 London Marylebone to Oxford due 19:10
18:35 London Marylebone to Oxford due 19:38
18:43 London Marylebone to Banbury due 20:04
18:48 Aylesbury to London Marylebone due 19:50
19:06 London Marylebone to Oxford due 20:10
19:32 Leamington Spa to Stratford-Upon-Avon due 20:10
19:42 Oxford to London Marylebone due 20:48
19:46 London Marylebone to Gerrards Cross due 20:19
20:11 Oxford to London Marylebone due 21:18
20:13 London Marylebone to Aylesbury due 21:21
20:35 London Marylebone to Oxford due 21:39
20:42 Oxford to London Marylebone due 21:47
20:42 Stratford-Upon-Avon to Leamington Spa due 21:17
20:45 Banbury to London Marylebone due 22:07
20:49 Gerrards Cross to London Marylebone due 21:32
21:29 Aylesbury to London Marylebone due 22:36
21:32 Leamington Spa to Stratford-Upon-Avon due 22:10
21:57 London Marylebone to Aylesbury Vale Parkway due 23:03
22:06 London Marylebone to Oxford due 23:09
22:09 Oxford to London Marylebone due 23:28
22:15 Stratford-Upon-Avon to Banbury due 23:02
22:27 London Marylebone to Aylesbury Vale Parkway due 23:33
22:57 London Marylebone to Aylesbury Vale Parkway due 00:03
23:10 London Marylebone to Oxford due 00:18
23:18 Oxford to Bicester Village due 23:36
And two more added later on Chiltern's Journeycheck page
00:10 London Marylebone to Banbury due 01:44
01:09 Princes Risborough to Aylesbury due 01:30
Plus 11 Sunday cancellations already notified on Journeycheck.