Depends on the model and spec.
Titanium rolhoff disc version= yes
There are several birdie models.
Called different names in different countries and tend to have different specs. Unless this has changed last few years.
The monocoque frame is avialable in any mark except the mk1.
Hubs vary. IHG, rear mech,or dual drive
Racks vary, touring, sport or city types. Vary from no racks to front and back panniers.
Brakes are disc or V brakes on all but mk1 afaik.
£1500 reguardless sounds cheap.