I don't entirely keep track, but around £100 for DS (3) - though lots of offers and use of nectar / tesco vouchers etc. A main big present (Imaginext pirate ship this year, only £15 real money!), a few medium presents (marble run, Woody and Buzz, Ali express paw patrol vehicles, some toy figurines and books) and a stocking (chocolate coins, lolly, wooden train, mr men book, matchbox car etc - all £1-2 items).
Baby DS is getting hand me downs and I've only spent money on some new 'essentials' which will be wrapped - sleepsuits and weaning things. So £30 max.
DH is also getting around £100, including some Lego which I feel is an investment for DSs when older...! Also a book, some PJ bottoms, Photobook of DSs.
Family (parents, siblings, nieces/nephews) get around £10 each on average but usually spend a bit more on my parents as they do a lot for us in terms of childcare, DIY etc