In reply to mike123:
Putting to one side the legality or otherwise of what your third cousin's hairdresser would like to achieve...
get-iplayer https://github.com/get-iplayer/get_iplayer is specifically designed to download content from BBC iPlayer and BBC Sounds. It has installers for Windows and MacOS, but has to be manually installed on Linux (some installers have been created for certain Linux distros but these are not supported by the developers of get-iplayer itself).
https://github.com/get-iplayer/get_iplayer
https://github.com/get-iplayer/get_iplayer/releases/tag/v3.35 (latest release)
https://github.com/get-iplayer/get_iplayer/wiki/installation
As a primarily Mac user, I use the Get iPlayer Automator app, which puts a reasonably friendly graphical front-end on the 'raw' get-iplayer. Get iPlayer Automator will also download programmes from STV Player - which includes most ITV1 content, though not feature films. I'm not sure whether 'raw' get-iplayer will do that. (Get iPlayer Automator does it using its "use current webpage" feature i.e. you navigate to the programme you want in STV Player in your browser, then click a button in the app to tell it that's the programme you want. This is also the technique you have to use for iPlayer and Sounds programmes which aren't listed in the 30-day iPlayer/Sounds cache. get-iplayer has similar functionality through its command line interface but as I mentioned above I'm not sure whether it works for STV Player.)
https://github.com/Ascoware/get-iplayer-automator
These apps are completely reliant on the BBC not disabling the APIs that the apps use to do the downloading. I believe get-iplayer has had to be modified a number of times in the past to get round changes that the BBC made in their API. The bottom line is that both apps may stop working at any time without notice. Get iPlayer Automator used to be able to download ITV programmes as well as BBC until ITV Hub was superseded by ITVX which employs DRM.
Whichever of the above apps is used to download the required programme, once the audio file has been downloaded from BBC Sounds it should be a simple enough job to edit it down to just the sections of the programme that you want. Audacity is a generally well-regarded app for this kind of job, available on MacOS, Windows and Linux:
https://github.com/audacity/audacity/releases/tag/Audacity-3.5.1