The problem with Mothercare is that they don't/didn't offer anything you couldn't get elsewhere. They used to corner the market on breast pumps, maternity clothes, strollers, cots. Now you can get all those things online, from Argos or the supermarkets.
I bought a few things from them when pregnant with my first 17 years ago, I found the quality OK, the staff certainly didn;t have any particular expertise, and it was expensive, especially things like clothing.