Both the Frelan Bathroom Indicator Bolts & the ironmonger.co.uk are great.
Good quality product [with circlip holding the bolt mechanism in place - rather than an iffy star washer].
Bought from ironmonger.co.uk a number of times and never had a problem....thanks

Very good. They use a circlip to hold the handle/cog in place, unlike some 'national outlets' whose indicator bolts use a star washer - star washers eventually become loose and prevent the handle/cog from unlocking the door...locking the person in the toilet.
JV2662SC uses a circlip which ALWAYS holds the handle/cog in place.