[mothered]

The item has just arrived and they sent me no email saying the package arrived they just took a picture of it sitting in the porch of my house.

This maybe a way to DNA

Perfect to DNA It.

as I think the EB method will not work.

You've said It weighs 180 grams, so It's too heavy to EB It.

They also posted the package via Royal Mail 24 Tracked which maybe an issue.

No Issue whatsoever - tracking only confirms delivery to an "address" and not "person-to-person".

They've dumped the package at your porch, hence anyone could've stolen It which essentially means you did not personally receive It.