I popped back this afternoon and during my visit, the birds swopped places on the nest with the right hand bird swimming off to collect more sticks, which the left hand bird then added to the nest.
Whilst there I also walked around the bottom reservoir, which is in the process of being drained, and took a few photos of the water levels.
As you can see, small spits of land are appearing and the water is already about 5m below it's normal level. Luckily the Little Grebe's nest is attached to the bales of hay in the water and they've gone down with the water so the nest is still safe. An adult was sitting on the nest and the other adult was again nearby. Hopefully by next week the eggs should have hatched.
Also flying about today were 6 Swifts and another first for the year, 6 House Martins. The male Pied Flycatcher was also singing around the picnic area by the middle reservoir and 2 Grey Wagtails were feeding on the water's edge. Both Magpie and Jackdaw were seen carrying food to their respective nests, which adds these 2 species to the ever-increasing list of Linacre's breeding birds.