Does anyone have any success using section 21?

I found this thread: Are Landlord Associations worth joining?

And Colin you say this in reference to NLRA:

“a few years ago when they had face to face meetings . Great When amalgamation came along, they became Sellers of products . Dissapointing. . Advice is ok”

Many say they found it useless. Others point out regional ones that they are happy with.

In this thread many LL Associations mentioned nothing blocked.

I asked a simple question. Thanks for the help!