I’m erring towards Meadow, but also await more expert opinions.
Edit: I am not particularly familiar with Tree Pipit, so will be interested to hear the views of even more people who are - does the buffy yellow colouring continuing to the belly occur often in Tree Pipit as it seems to here, or would that help point to Meadow. The hind claw seems fairly long in photo 1 and maybe partly obscured in photo 3, but then I can easily see things to point me either way!
To my eye it’s very much Tree Pipit, apart from what has already been mentioned (hind claw and streaking), the ground colour is of a cream/buff wash more typical of Tree Pipit, also the pale contrasting dot within the ear-coverts another useful feature to look for.
All the birds in all of your images are Tree Pipits, the reasons why have been covered well already by other posters. In addition, the legs are pale pink rather than the more orangey colour often seen on Meadow Pipits.