Looking for advice on doing a low amp spur correctly

[BlueLoo]

Hello o learned ones
I'm looking for a thumb up on "Reasonable" practice for adding a 240v spur.

In my Airing Cupboard i have a hot water tank with a immersion heater. (240V 3KW / 12.5A)
(I've a Gas boiler so it's not really used except for the odd boost.)

In said cupboard i also have:
A Sky router (240V-12V 10W, 0.05A)
A Hoover charger (240C-28V, 35W, 1.25A)

To power those 2 items, I've run a 240V single plug spur off the incoming immersion heater feed and have a double plug adapter.

I now also need to add:
A light (240V-12V, 2W, 0.0000A)

See picture below:
Wiring is:

240V in to 20A switch (neon) ---->Boost switch---->Immersion heater
----->Spur from 20A input ----> 13A Socket----------> Double plug.

The 20A switch is fed by 2.5mm, which is rated for 20A? (method depending).

The easy option here is to just screw a standard multipoint extension lead to the wall, plug it into my spur and plug my other 3 things into it.
But now i'm wondering if i am breaking any codes here?

Is this ok?

I don't need power from this socket, just a bit of voltage really to get those 3 small watt items working.
Should i change the single socket to say, a 5A fused one?

Any thoughts appreciated.

 

[jj4091]

Yes just use a short extension lead and get a switched led lamp fused down to 3A and plug everything into that

 

[endecotp]

It would be good practice to label the socket as "immersion heater circuit". The issue is that someone wants to open the socket for some reason and turns off the "sockets" circuit at the CU, and then gets a nasty surprise.

 

[mikehammer69]

Keep in mind you're choosing to battery charge in a hotpress
Risk is low enough but I would do it elsewhere