This may be a daft question but is there any news on an actual website where you do the pre-registering, paying, and registering thing etc?
Does it come nearer the time?
Since you enjoyed Wander Wye (too), Paul, the website for pre-registration should be ready (with bugs ironed out) by 28 January, when your time comes.
As @Vorsprung implies, don't start holding your breath (yet). You have another 7 weeks to decide what start time to earmark, once the 1000+ers have had their pick
2019 Pre-registration
The date at which you will be able to pre-register for PBP will depend on the distance of your longest 2018 'pre-qualifier' (BRM):
Pre-registration will open (provisionally):
1200km or 1000km 14 January 2019
600km 28 January 2019
400km 11 February 2019
300km 25 February 2019
200km 11 March 2019