30.0g carbs in a single warbutons toasted teacake. raisins are very high in net carbs ~75g per 100g weight.
have you tried make your own teacakes if its something you enjoy that gives greater control over sugar content?
https://www.myketokitchen.com/keto-recipes/keto-cinnamon-tea-cake/ is pretty nice. i put in muffin moulds could throw in a few cranberries relatively lowcarb or could add a handful of fresh raspberries/blackberries/strawberries. (cook for extra minute or so if adding). could also use mix few raisins with the other berries so would be less carbs that get turned into sugars than the normal shop bought ones.
dairy products have natural sugars lactose. could swap milk for likes of (unsweetened) almond milk (if like the taste of almonds) which contains a little less around 100ml almond milk is ~1.5g vs milk ~5g to reduce a little bit would give it a slightly nutty taste.
curious if you've been offered an education course if not could ask for dietician (which can be a hit or a miss. some appear to like highish carbs - such as mac n cheese... / wholemeal rice etc). a wee look through the sucess stories of the forum alongside recipe area's you might find useful.