Update 2019-04-11: Early on Thursday morning (11 April, local time), the British government and the member states of the EU agreed on delaying the date for the withdrawal of the United Kingdom from the European Union until 31 October. An earlier Brexit is still possible if the British parliament ratifies the previously negotiated withdrawal agreement. Great Britain, however, must leave the European Union on 01 June if it chooses to not take part in the election for the European Parliament scheduled for 23 May.
AFP, BBC, Reuters
2019-04-04: On Wednesday (03 April) the British House of Commons agreed to another postponement of the Brexit. The aim should be to postpone the Brexit until a new and acceptable deal can be negotiated. However, this requires the approval of the remaining 27 EU member states, which is to be discussed at the EU's special summit on Wednesday (10 April). As this approval is currently considered unlikely, a disorderly No-Deal-Brexit on the night of 12th April is the most likely outcome.
If this is the case, there may be considerable delays at border crossings and airports, as customs controls become necessary in the case of a No-Brexit deal.
Tagesschau, The Guardian