As Tamsin is leaving the House and forest for the last time in the final sequence she walks down a rough track road, in the montage a 4x4 vehicle appears in the middle section.
In the scene where Natasha runs out of her room screaming after being 'touched by something'- Max appears and goes to check around the gardens, before finding out that at the end of the scene Natasha and Dan change rooms. On his return later, he goes to Natasha's original room with Dan now in it - how did he know?