Need to apply to increase maintenance payments but no money for solicitor 😞

[hurryup]

To cut very long story short - exH is very wealthy, I am not. He wasn't granted clean break at divorce court as I had new partner but now am single again. He is refusing to increase children's maintenance and says it's my problem and he already gives me more than enough. He is about to remarry. Any idea how I progress this without a solicitor, I can't get legal aid and he is a barrister

Child maintenance services?

Thanks, cms isn't helpful as I've more than 3 dc. Babybarrister - I had no idea I could access a barrister directly (even though my exH is one). I've looked into it and feel much more positive. I'm sick of being skint abc struggling to pay for school trips when exH and his gf are spending 1.5k on a sodding rise garden.