We booked J from Australia to Vietnam in November for July (Australian school holidays)
We got what we believed to be a great price, wife wanted to wait a while to book, I didn't, we literally grabbed the last tickets in that fare bucket and they went up by the equivalent of 1200USD for both of us overnight and only got higher from that point.
If you see a good price now and wait just to save what could literally be 50 quid I think it could work against you.
If you like the price buy it now.