What makes something a fixed asset?
Two tests. It will be used in the business for more than a year, and it cost enough to be worth tracking. A £6,000 van passes both. A £15 hammer passes the first but not the second, and goes straight through as a cost. Stock bought to sell on fails the first test, however expensive, because it is meant to leave.
The threshold for 'enough' is your own policy, applied consistently. Many small businesses treat anything under a few hundred pounds as a cost regardless of how long it lasts, because tracking a kettle on a fixed asset register is effort with no benefit.
Fixed assets are recorded at what they cost, including delivery and installation, and then depreciated over their useful life. The balance sheet shows the cost, the depreciation charged to date and the net book value. A fixed asset register lists each one individually, with its date, cost and depreciation, which is what your accountant asks for at year end.