To balance out the negative - I've had a Sainsburys card for years, and never had a problem with their customer service. I bought my Monarch flights through it, and they refunded within days of Monarch going under.
I had a sainsburys credit card and online management of app was virtually non existent or very basic. I had to raise a section 75 claim and even tho i was with the 0% promotional period they then started charging me monthly interest, apparently something in T^C's anyway they did credit the interest back eventually and did settle my section 75 claim in 5 months mainly because i proposed a settlement figure just so i could leave them. Personally id use Natest or Nationwide if they have decent deal. Used them both for years for banking, mortgage, credit card and loans and never had a problem plus apps and online banking and customer service better.
May be they have a monthly allocation to achieve if you apply towards the end you miss out.
Thanks op :) got £5k credit limit for 18 months. Heat
Was just accepted, thanks! Anyone else still waiting on a confirmation email?