Ring Alarm UK: can we have the additional sensors and options please?!

Hi,we have just the simple small Ring Alarm set available here in the UK, with the option to add additional Motion, window/door sensors and extenders.When will we be offered the full range of Ring Alarm senors and options? The lack of an external siren is very noticeable when comparing options in the market for self-install home alarms.Being able to buy say a pack of 3 or 4 window/door sensors would also be great for those who early adopted when just the single sensor Alarm pack is available.