Hi Jen,
Chocnuts and lucky me pancit canton can be purchase in the the Asian shops here in UK
dried mangoes and banana chips can be purchased in Sainsburys and Holland and Barrett
not sure about Tomi and nutristar
I didnt bring any dried fish and dried squid as all can be purchased here(less salt) made in Thailand
crispy dilis or dried anchovies can be puchase in korean shops (if theres one in your soon-to-be home here in UK)
My only suggestion is ...eat all the filipino foods you will miss especially your Mum's own recipe/menu/dishes as nobody will cook that for you here in UK.
Have a safe trip