Alternative to swa?

[Olec]

I've recently changed a broken outside socket for a customer and discovered all of their garden lights and sockets are wired in t+e running along the ground. The install is fed from a 13a fcu (30ma rcd). At the moment the 2.5 t+e is coming through the basement and then goes behind some concrete steps and appears between these steps and the garden wall where it then feeds several lights and a socket. I can't get a new cable from the basement without extensive work so my plan to improve the install is to go straight to an adaptable box where the cable comes out in the garden, and then use armoured down to each light via 20mm galv conduit boxes, finally feeding the socket at the bottom of the garden.
I have a couple questions...
Firstly, as you can imagine everything is already working so this job is on a budget because the customer is taking my word on it being unsafe so I'd need to keep costs reasonable to get it. Using my swa method involves 14 glands, I know there are some possible alternatives to armoured like SY but haven't used them myself. Is there anything suitable that will go in a stuffing gland? It is a low level install but little risk of getting hit by anything (further gravel type flower bed below it).
And secondly, in an ideal world I'd run the socket separately but I'm working with the t+e circuit available so does anyone see a major issue with the fact I will have light fittings on a 13afcu as the cable will be big enough.
Hope this makes sense, ta

 

[Brightspark2]

SY isnt an alternative, remember the steel braid isnt armour but screening.

There isnt really any alternative for this job IMO. No problem with feeding the lights from a FCU.

 

[Andy78]

Same as above. Price for SWA, if you get told it's too pricey, don't do the job.

 

[johnboy6083]

The only other alternative is to fit conduit.

 

[Darkwood]

Galv steel conduit or swa both not overly expensive unless you dont have the correct tools already, corners should not be cut to keep cost down ..... some may even say plastic conduit but this is inhetent with issues when used outdoors like buckling in summer to which expansion couplers can be fitted but this leads to diminished ip rating.

 

[Olec]

Ok thanks guys, avoiding conduit because there are several pillars on the garden wall. Haven't done galv for years so think it would take me a lot longer than armoured. I will use armoured to galv boxes with flex to the lights.
Don't want to do a sub standard job, just thought it was worth an ask in case I've been missing out on something, which it seems I'm not.
Just to clarify as for the fcu, it will have a 13a fuse in it because of the socket at the end of the run so the guts of the lights won't have over current protection but the supplying cable will. Can't see a problem with this as the fittings should only be pulling there load. (This is one of the reasons I'm not connecting directly through the lights connector blocks).
Thanks all for the advice, appreciate it.

 

[Guitarist]

If it's not going to be buried at all, I would consider Hi-tuff. It's very strong, plus fits into normal glands.

 

[Lou7]

Cw glands are only £5. Pack of two , surely that won't break the bank.