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The F1 is a pretty heavy cable that's not easy to flex in relatively confined spaces without putting pressure on the HDMI connector i.e. the back of an AV rack etc. It is certified to CAT2 upto 25'. The F2 is much more flexible and easier to worth with. It's certified to CAT2 up to 15'. Under 15' I'd use the F2.
IIRC If you spend over £40 delivery is free. Less that that and there is a fee that reduces the closer you get to £40. You can check out the charge by going through the order process but not placing the order.
The cables I've ordered come from the US and arrived withing a couple of days. Very fast delivery by Fedex.