Invasive Asian hornets have worryingly been spotted across the UK – but there’s plenty you can do about them AND their smaller pesky cousin the wasp. From a genius plant trick to sealing up nest spots, an expert reveals all …Invasive Asian hornets have worryingly been spotted across the UK – but there’s plenty you can do about them AND their smaller pesky cousin the wasp. From a genius plant trick to sealing up nest spots, an expert reveals all …