£ pound sign / symbol in email

[eluser]nevsie[/eluser]
Hi, and stupid question time...

I am sending a simple plain text email using the mail class and having real trouble with the £ (pound sign)...

Code:

$this->email->clear(TRUE);
$config['charset'] = 'iso-8859-1';
$this->email->from('[email protected]', 'xxx');
$this->email->to($userdata['email']);
$this->email->subject('xxxxxxxxxxxxxxxx');
$this->email->message($this->load->view('xxx/xxx', $userdata, TRUE));
            
$this->email->send();

I have had a few different attempts and encodings, but so far no joy at all... Someone please tell me the obvious thing i am missing!

thanks, N