i have looked into getting a trailer for the mondeo.

i can tow up to 750kg on my standard lisence, but if the trailer weighs more than 750kg your ok if the combined weight of the car and trailer is under 3500kg your ok

so the mondeo being 1500kg, the fiesta being 1100kg and the trailer weighing 500kg max, its under the limit
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Red Escort 1.6LX
Then - Red Escort 1.4
Then - Silver Fiesta ST 170BHP
Then - White Fiesta ST MR200+
Now - Mitsubishi Evo IV Forged 2.3 500BHP
and Mondeo Mk3 2.0TDCI