the flat is owned by aiman elwafi.his friend told the bbc what aiman found after abedi had left. a piece of metal in the bathroom and electricity switched off, fire alarm is switched off. he can smell a strong, strong, strong smell coming out from the carpet. aiman told me, i think it's like diesel, like petrol, something chemical. detectives say they've made very significant finds and, crucially, believe they have captured a large part of his terrorist network. we have seized thousands of exhibits which are now being assessed. i think it's fair to say there has been enormous progress with the investigation but still an awful lot of work to do. police have found bomb—making material, but because of concerns about what might still be out there, the threat level will remain at critical. the public can expect much higher security at the 1,300 events in the uk this bank holiday weekend. we mustn't let this terrible terrorist incident impact on our lives. let's carry on this weekend, this bank holiday weekend, with our fami