With warship and submarine production that's pretty much what they're trying to do. The Type 26 frigate will follow on from the carriers (helped by adding three OPVs in between) and will be delivered at around 1 per year. In particular they're trying to achieve a seamless flow for submarines, with the Astutes being followed by the successor bombers followed by Astute replacement - the UK learned a very hard lesson from failing to do this before the Astutes came on stream.