Can you help me? I have never used liners in any of my bags. However, I keep reading that they are a ‘game changer’ for the Speedy b 25. I generally love the sag but must admit the ‘pit’ can become frustrating when looking for something in a hurry. To make things more complicated I am in the UK and most of the big makes are in the US. What ones do you recommend and are there any UK stockists? It is important for it to be lightweight. Many thanks for your advice.