Hi

[Gerryjo]

Hi Francis welcome,as Johnm said about your headspace you could try cutting some polystyrene using your lid as a template and wrap in clingfilm and place inside your mash tun to help reduce it.You can get inch or 2 inch at a builder's merchant.Happy brewing.

Sent from my ALE-L21

[Dracusse]

Aha nice one i will try that and im not Francis 😝

[Gerryjo]

Sorry Dracuse predictive texting.Good luck with your brewing.

Sent from my ALE-L21