Is it worth it?
The Dell Latitude 5400 is a renewed 14-inch Windows laptop aimed at anyone who wants proper everyday productivity without paying new-business-laptop money. Its strongest appeal is easy to understand: an Intel i5-8365U, 16 GB of RAM and a 512 GB SSD are still a sensible office-and-study combination. The trade-off is just as clear: this is a refurbished route, so the value can be excellent, but battery health and unit-to-unit consistency are not as dependable as a new machine.
I’d put this in the sensible home office, study and light business lane rather than the premium mobile lane. Buy it if you want a UK-keyboard Windows 11 Pro laptop for documents, browsing, admin work, remote access and general multitasking, and you care more about memory and storage than about a sharp modern display. Skip it if long unplugged use is central to your routine, or if you want a cleaner, more clearly modern screen experience.