As June begins next week and depending on the dates of the trip, the OP may have to pay the roaming charges at the start of his trip but may be able to avoid them later on. Hope it's a good heads-up for him/her.
But you replied to Uno rather than the OP. The OP stated they have an EE sim - EE already allow you to use all your allowances whilst roaming at no charge. Uno may well not be going abroad until after the new roaming kicks in on Voda.