I have just received the same letter from them - I have sent them 3 letters.
my question is - if after 4 weeks, I haven't had another letter from them, can I still send an estoppel, or is this a crafty way of them trying to nullify an estoppel, ie: are we (legally) supposed to give them time to investigate, as they have requested?
Grateful for any thoughts.
PS Sorry to butt in on your post slik1999 but our letter is exactly the same as yours !!