I had a nightmare time with hallifax.
When I applied for a hallifax credit card, I sent of all the documentation - proof of address etc with the application form seeking a balance transfer of 2,500e. It took them 4 weeks to send me my credit card, with a credit limit of 1,250e!!! I requested this to be increased straight away. I was fobbed of for 6 weeks saying my application was being re-processed by the underwriters and was at the bottom of the pile, before they admitted that they had lost all my documention and I was to send it all in to them again. The most annoying part was one of the customer representatives admitted that he could have increased the credit limit himself and that it didn't need to go to the underwriters - this was after 6 weeks of phone calls. I have never encountered such inefficient and bad customer service ever before. I was honestly so annoyed I cancelled the account.
I subsequently applied for a First Active credit card and that was processed within two weeks with a credit limit of 5,000e.