The internet has ensured that at least everyone can get to know of and even see the available accommodation offers lakes whenever they are out. So, you have no excuse of saying you are not around so you missed out on an offer. The details are usually given well and even the expiry dates of the offers are usually clearly stipulated. The terms and conditions for qualification and application methods are also normally given. 

To be sure, you will need to first decide on the places to stay in the Lake District that are appealing to you. Then, you can proceed to find out what the cost implications are and whether there are any offers that are open at that particular time. This way, you can be sure that you will never miss out on any of them. 

You can be sure that at least you will be able to locate one of the many good hotels on Windermere which could be having offers. They never give similar offers at the same time. Neither do they all have offers at the same time. This you can find out from the internet.

A good thing never comes easy or quick. Whenever you want to benefit from this, you will be able to successfully do so if you have time. Do not be so much in a hurry. Devote time and you will definitely benefit from your search.