Surely they can't call him back after a week? They'd have to pay us anyway! They wouldn't have sent him out on loan if they didn't have a replacement in that position anyways so fingers crossed that we're fine.
They can't recall him within the first 28 days of the loan. http://www.chroniclelive.co.uk/spor...option-to-recall-david-meyler-72703-32204341/
It's a short-term loan, which means there's a maximum of 93 days and they can recall him any time after the first 28 as OLM says.