Phil, I think you have to be very lucky to get Lesser Spot in the Wyre ad hoc, and as I said to Gavo today, he has had more jam than Hartleys.
I was chatting The John R the other day about LSW in the Wyre, he was guestimating around 1 in 12-15 visits he gets it, and he live's near there and knows it well.
Most people try and get it from the Bridge at Lodge hill, this is where most reports come from. Chatting to the ex warden who lives there still recently, he hadn't seen one for quite a while, I think he said the survey a couple of years ago said there were 5 pairs then in the forest. My expereience and information of visiting the Wyre fairly regularly ( and people like JK will support this, who have many more visits under their belt) is you have to be lucky to get it.
It's certainly not a place to go specifically for LSW in my oppinion, it's a possibility you may get it whilst there, I visit it on a regular basis to see the diversity, not just birds, but anyone who says Lesser is easy in the Wyre is either out of touch or charmed
Gavo, let me know next time you are visiting please :-O