Yes, a little odd - but BCOs aren't necessarily known for their consistency (nor, in some cases, even common senseWell, I always like to put a heat alarm in a kitchen but on a recent job the customer said she didn’t want one and the BCO said she didn’t need to have one - which I thought was odd because he normally said they had to be fitted
Smoke alarms in kitchens can obviously be a problem/inconvenience. - so we all tend to use heat alarms there for that reason. However, I imagine that there has to be quite a fire going in a kitchen before a heat alarm operates (they must have a reasonably high 'threshold' - for a few days a couple years ago, it got to 40 degrees or so in our kitchen, so probably higher at ceiling level), by which time I would imagine that enough smoke will have been generated to activate other alarms in the house - so I'm not convinced that heat alarms in kitchens are necessarily as useful as we would like to think. However, they do no harm (and might do good), so we usually fit them.