Blisters!

[Hercules12]

Hi. Recently started the nhs couch to 5k and just completed week 5 yesterday. The 20 min run or very slow jog was a killer!
Need to ask a question though. I woke up this morning with a blister on the top of a toe. Not had one since I was 5 wearing Wellington boots all day.
My running shoes are asics and I did the running test in a shop but this was 7 years ago. The shoes haven't been worn much though and are in really good condition.
Do you think it's my socks causing the blister? I've just been wearing my dd's school white over the ankle type sport socks - same size as me.
Shoes feel fine when on what ever socks I wear although the side where I got the blister does feel a little roomy at the back when I first put them on but I don't notice this once I'm moving.
Do I need new shoes or socks or both or are blisters just to be expected?

1000 mile socks are amazing. Not had a blister since wearing them. I do about 25miles a week in them. www.amazon.co.uk/gp/aw/d/B00BQXQNQU/ref=yo_ii_pd_dx_s_1?ie=UTF8&pd_rd_i=B00BQXQNQU&pd_rd_r=3HPSQ4BSZ3AX9A8TMFR1&pd_rd_w=93PrG&pd_rd_wg=KTqir&psc=1&refRID=2KZ0XTP9W08SSTHVZMH3&tag=mumsnetforum-21

Thanks! As a vastly more experienced runner than myself would you say it's the socks rather than the shoes that are the cause?

I've worked through several pairs of trainers since wearing these socks (I have several pairs, not one really smelly pair of socks )and haven't blistered with any of my new pairs like I used to in the past.
I suppose blisters on the heal could be down to trainers being loose, but blisters on other parts of my feet have been down to moisture and friction which these socks reduce.
When similar threads have been posted, I know that a few other MNs use these socks too.