When MPs return from their summer recess, parliamentary battles on the road to Brexit will be held on the following key dates:20 September: EU leaders discuss Brexit, possibly at a full summit. 17-18 October: EU summit deadline for agreement setting out the ‘divorce’ terms of the withdrawal agreement.A political declaration on the future relationship between the UK and the EU is also expected at this point. November: there is speculation that an emergency EU summit on Brexit might be held if a withdrawal agreement is not reached in October. 13-14 December: EU summit. If a deal has not been done by October, this is the fall-back option if the two sides still want to reach an agreement. 2019: withdrawal agreement approved by UK and the EU.