I'm currently reviewing and validating the returns for the squares SD82 and SD72 (part), and thought it would be useful to summarise the present position.
The project is about half-way through and with all your considerable help we have achieved pretty good coverage.
In SD82 the following tetrads have had full TTV returns A, B, C, D, E, F, G, H, I, J, K, L, N, U (14 tetrads)
Of the remainder 3 are already allocated to someone (Q, T and V) leaving 8 currently unallocated:
SD82 M Dean
P Crown Point
R Bacup
S Weir
W Reaps Moss
X Sharneyford
Y Cliviger, NW of Portsmouth
Z Shedden Clough, Long Causeway
In SD72 tetrads having full returns are B, E, F, G, J, L, R, V. Those allocated are A, C, D, I, K, M, N, P, Q, S, T, U, Z.
This leaves 4 unallocated:
SD72 H Higher Bold Venture, Whetstone Edge
W Haslingden
X Acre
Y Mitchell House Res
There are also still one or two Lancashire tetrads in the squares to the south, which come under the Manchester Regional Rep. (They may not show as unallocated as yet as I logged them against my name.)
SD71 E Cranberry Moss
J Aushaw Moss
P Edgworth Moor
SD81 D Harden Clough
J Whittle Hill/Scout Moor
If anyone feels able to tackle one of these in the next two years please visit the BTO site (http://www.bto.org/birdatlas/index.htm) or contact me (jimormerod AT yahoo DOT co DOT uk).