Sensational shift in Ladbrokes book
Article 50 Extended And UK Remains In EU After Oct 31
To happen on or before Oct 31 2019
1.33
Uk to leave EU with No Deal
To happen on or before Oct 31 2019
5.00
UK to leave EU with Deal
To happen on or before Oct 31 2019
9.00
UK to Revoke Article 50
To happen on or before Oct 31 2019
17.00
Brexit seems off
No, because all of those odds refer to "on or before Oct 31 2019". Brexit, with or without a deal, can happen at a later date.
Though this comment is probably a waste of effort as you don't seem to respond to comments about these odds that you post.