I’ve read that the effective % return you get on PB’s is determined in large part by how many of them you have. But I have nearly £40k of them, not far off what I believe is the maximum, and yet I am still only getting somewhere between 2 and 3% on them, over the course of the 12-24 months. I believe the maximum is £50k. If I topped mine up to this level would I notice any difference on my % return ?