[mothered]

My plan was to have two seperate orders, addresses etc. One for a cheap pair of trainers around £170 and one for the expensive pair £500 both similar weights and carry out wrong item to make it look like a warehouse issue. Its the cctv thing putting me off i would need to look into what courier they use also.

As with every SE, the first port of call, Is to research the company In question- terms & conditions, carrier, Internal claims management and so forth.

You then prepare/formulate and execute your method based on your findings. As such, you'll make Informed decisions with the SE as a whole.

Did you find out about flannels?

I didn't mention I was going to research them.

That's the OP's job.