I used to work with (they were contractors for us) a company that used to fly Harris Hawks etc to keep the bird population away from our premises - they were effective but you had to fetch them back in every now and again. Check out google. There is a company on that big Island in N Wales as well as one that could almost be a member of NHBC - I used the latter one quite a lot.
I am not connected in any way to either company just used them in the past.

Contact a pest control company and ask them to come in and advise. Fireworks (bangers), kites, and birds of prey can all be used, only the latter seem to work in the long term but it is very expensive. Even then the gulls are smart enough to know that the bird guy leaves at the end of the day and then they descend in force.

Oh, be careful with fireworks. Once had a fairly large landfill site fire occur because someone was a bit too liberal with throwing them around! Nominate an area away from the waste for them to be let off.

ummm

Though you say black bag, which I take to mean general rubbish. I assume the birds are there as there is still food in the waste. I always thought large mounds of waste with organic matter produced methane, so is fire / fire works such a good idea.

It would get rid of the gulls, though. I don't think you can eat barbecued gull.

Chris

Hello, my first post.
My partner has some issues with seagulls as he is a postman and during breeding season when he is on duty close to the sea those birds keep swooping at him when he gets close to their nest (which is usually on the roof of the houses around). He kept reporting this to his managers but there is very little or nothing they can do it seems. Does anyone have some ideas if there is anything that could help?

Thanks

An umbrella

I guess you could have something printed on it, Gulls nest, Pavement Pattern, Bird of Prey.

I have had this issue where I work previously. Every time someone picked the remote control for the external gantry crane up, they were attacked. Tried bird of pray which works only as long as the bird is there. Plastic ones in strategic places don't work for long.

Offered stock yard man a hard hat or umbrella, he declined both and just put up with it. He didn't want them hurt in any way.

He could try and make friends with them, by buying them their own bag of chips.

Chris