Constantly hungry cat

[MatchsticksForMyEyesReturns]

He's 4. I've posted about him before. He needed to lose weight and has, after being monitored by the vet. He harangued me constantly for food. I have 2 automatic feeders so he gets fed 4x a day. 1.5 sachets and 1 tbsp of biscuits. Yet as soon as he sees me, he starts miaowing for food even though it is often minutes since the timer went off.
When I say he miaow constantly, I mean constantly. If I don't get up to feed Jim, eventually he will try to scratch my face.
I don't know what to do as I am now finding it stressful. He has a 6mth check up with the vetinary nurse next week.

Does he really only eat 1.5 sachets of wet and a tablespoon of dry food a day?
Not surprised he's hungry, mine eat closer to 3 sachets each per day plus dried food.
How overweight is he and how much exercise does he get?

What food is he on, and is utterly 1.5 sachets a day or a feed? With kibble

I'm not surprised he's hungry, that sounds like a paltry amount of food, especially if the sachets are junk like Whiskas or Felix with far too little meat.

It sounds like he's reached a healthy weight now? How active is he and does he go outside? Have you actually calculated how many calories he needs vs. what he gets? If you haven't, that would be my starting point.
Also make sure to buy good quality grain- and sugar-free cat food with a high meat content and no rubbish fillers like maize or potato in it. Since you're already using a timed feeder, I would also lose the dry kibble (unhealthy and usually full of junk) and give him more wet food instead.

One of our cats is naturally a bit on the chunky side and loves his food. Whenever he gets a little too heavy, rather than restricting food, we try to increase play times and this works really well. In our case, a laser pointer is a great and very low effort (don't even have to leave the sofa) way to get him moving.

What kind of wet food would you recommend? He's on biscuits with no maize, but it's Felix Duo he's on now. Thr amount was okayed with the vet.

That is a tiny amount of food.

I would work out what he should be having (go for the lower end of what's recommended for his weight) and just feed twice, eg wet in the morning and dry in the evening. And ditch the auto feeder which might make him more frustrated.

For brand recommendations have a look at this thread from a few days ago:
www.mumsnet.com/talk/the_litter_tray/4728786-new-whiskas-the-one-with-the-cod-flavour?page=1

You say the amount was okayed with the vet, but they probably won't know the calorie content of Felix Duo or your dry kibble, so I personally wouldn't rely on this too much. Sadly many vets know very little about cat nutrition (the topic is not really covered at uni), but I'm honestly surprised any vet would recommend feeding Felix (I know lots of cats like it, but it really is junk food).

Have a look at this site to work out how many calories your cat needs first, then buy good quality cat food and feed the suggested amount. Not all cat foods display calorie content, but you can easily work this out yourself by adding up the protein (1g = 4kcal), fat (1g = 8kcal) and carbs (1g = 9 kcal) content listed on the tin.

How much was he eating before losing weight? I'd look at somewhere between what he's on now and the amount he had before. My boys certainly wouldn't leave me alone if they had 1.5 sachets of Felix each plus crunchies.