While I can understand that seeing a number of abandoned carts can be concerning, they are a normal part of operating an online business. A few things that can cause abandon carts are:
I'd recommend reviewing your store and comparing it to the points made above. See if anything sticks out to you.
thanks for the response
my shipping is set at £3.75 and free shipping with orders over £100. I don’t think that’s unreasonable?
nu payment methods aren’t restricted to one payment it’s got most of them.
the checkout does work as I got my partner to do a dummy order on there and it works fine.
Thank you for the context. I don't think your shipping is unreasonable either; so this is likely due to people simply checking out the website if you're unable to see any errors appearing in the checkout.