Hattons have announced Genesis, a range of generic 4 & 6 wheeled carriages in OO gauge. Metropolitan Railway livered carriages will be released as part of batch 3. There is currently no release date or RRP for the batch 3 models.
Historically, Jubilee coaches were reintroduced onto the mainline in about 1909 so ran behind the older Westinghouse and BTH locos for a few years until the Dreadnought stock was introduced. They were all gone by the time the Metro Vik locos were introduced.