Tweak to some Config

Hey friends,
Hopefully a quick and easy fix but I can’t seem to get it right. I have set up a UK Fuel sensor with subsequent template, it is pulling through just fine, but can’t get the value to present the way I need. I would like the currency, then value with 2 decimal places.

Any help would be appreciated.

TIA

Current: 1.3 £
Required £1.32

sensor:
- platform: rest
  name: Sainsbury_Fuel_Prices
  resource: https://api.sainsburys.co.uk/v1/exports/latest/fuel_prices_data.json
  json_attributes_path: "$.stations[?(@.site_id=='gcqpnbmvq372')]"
  json_attributes:
   - brand
   - address
   - postcode
   - location
   - prices
  value_template: 'OK'
template:
  - sensor:
      - name: "Sainsburys"
        state: "{{ '%.2f' | format(state_attr('sensor.Sainsbury_Fuel_Prices', 'prices')['E10'] / 100) }}"
        unit_of_measurement: "£"
        state_class: measurement