Laravel job not passing variable to end view

Evening all!

Trying to get my head around adding queues / jobs into my application...

All working fine however I am struggling to pass variables into my email view, the variable is declared starting in my controller and then need to be passed along the chain - In theory it should work like

Controller -> Job -> Mailer -> View

However the variable isn't reaching my view and I am getting an undefined variable error on $booking.

I am probably misunderstanding how to pass variables between jobs, mailers and views!

CONTROLLER

  public function store(Request $request)
    {
        
	$booking = new Booking;

## Some code here to store request into DB which I have removed as not relevant but you can see booking is declared here and i know this works I am using the variable for other things ##

	// Generate PDF to attach to email with booking details
        $pdf = \PDF::loadView('booking.pdf', compact($booking));

	// Make the job and queue the email 
        SendBookingEmailJob::dispatch($booking, $pdf);


    }

JOB

namespace App\Jobs;

use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;

class SendBookingEmailJob implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

    public $booking;
    public $pdf;
    /**
     * Create a new job instance.
     *
     * @return void
     */
    public function __construct($booking, $pdf)
    {
        $this->booking = $booking;
        $this->pdf = $pdf;
    }

    /**
     * Execute the job.
     *
     * @return void
     */
    public function handle()
    {
      //SEND EMAIL
      Mail::to($this->booking->client->email)
      ->send(new BookingCreatedEmail($this->booking, $this->pdf));
    }
}

MAILER

namespace App\Mail;

use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Mail\Mailable;
use Illuminate\Queue\SerializesModels;

class BookingCreatedEmail extends Mailable
{
    use Queueable, SerializesModels;
    public $pdf;
    public $booking;

    /**
     * Create a new message instance.
     *
     * @return void
     */
    public function __construct($pdf, $booking)
    {
        $this->pdf = $pdf;
        $this->booking = $booking;

    }

    /**
     * Build the message.
     *
     * @return $this
     */
    public function build()
    {
      return $this->view('emails.bookingCreate')
      ->with('booking', $this->booking)
      ->subject('Booking Created')
      ->attachData($this->pdf->output(),'booking.pdf');
    }
}

VIEW

<h3>{{$booking->client->contact_first_name}} {{$booking->client->contact_surname}}</h3>
 <pre>

{{$booking->client->address1}}
{{$booking->client->address2}}
{{$booking->client->town()->value('town')}}
{{$booking->client->county()->value('county')}}
{{$booking->client->country()->value('country')}}
{{$booking->client->postcode}}
</pre>

ERROR

Facade\Ignition\Exceptions\ViewException
Undefined variable: booking

Any help would be much appreciated as there only 2 posts on this matter and neither has found a solution yet! Thank you.