Dear Carolyn,
Thank you for your quick and informative reply. I feared this was the case. There will be no ADSL upgrade in our village until 2016, and then only 2 Mbps is promised to the 50 homes, 3 farms and 5 businesses. Nor do we have 4G mobile or even 3G. I shall have to consider satellite which is still slow and costs a fortune.
I downloaded Safari 7.0.3 this afternoon, which took over two hours. I shall now have to download it into the other Mac.
I think Apple are very unhelpful in not making Manual Update installers available. I recently upgraded to Mavericks 10.9.2, which took 30 hours on each computer. There were some interruptions and even a short power cut, but the downloads would always resume from where they stopped.
Apple don't even explain how many Mbytes an upgrade is, so to start downloading one is a leap in the dark.
Thanks again
Peter