Phlegm anything to reduce it?

Speak to your GP. There might be an underlying cause and you need professional advice.

Yes NAC, a supplement available online.

Buy a quality one.

I have used this for over 10 years as a supplement and just increase the dose if I have a cough/chest infection.

Here’s the technical blurb.

Yes, N-acetylcysteine (NAC) is highly effective at managing mucus. It acts as a powerful mucolytic agent that breaks down thick, stubborn secretions, making them easier to clear from your airways.Here is how it works and what you should know:How it Thins Mucus: NAC disrupts the protein (disulfide) bonds in mucus. This physically decreases its thickness and elasticity, turning sticky mucus into a looser, more watery consistency.Reduces Inflammation: It also acts as an antioxidant and anti-inflammatory agent, which helps reduce swelling in your bronchial tubes and airways.Typical Uses: Doctors often use NAC for conditions that involve excess or hardened mucus, such as chronic bronchitis, COPD, asthma, and cystic fibrosis.

I have always believed that cutting down on dairy products helps in reducing mucus.

Usedtobeblonde

I have always believed that cutting down on dairy products helps in reducing mucus.

Same here!

I think this isn't actually true.
It's to do with mouth-feel.

www.copdfoundation.org/COPD360social/Community/COPD-Digest/Article/293/Milk-Products-and-Mucus-in-COPD.aspx?hl=en-GB

It could be a digestion problem rather than a respiratory one. If acid reflux, heartburn and indigestion bother you then I would see your GP.

Is it safe to take with Bisoprolol? I will ask GP but wondered if anyone here has taken the two together?

This is a medical problem. Do not seek advice on internet. Contact your GP or a Practice Nurse at the surgery. I had this, and was prescribed medication which helped to deal with it.