I went to book for 3rd June next year for 4 nights But it will not give me eurostar transport when before it did? They can't be fully booked already or are they?
Tickets have been available for at least two months. A lot of people phone up and get put on the waiting list. It's early when you're thinking about June next year, but not when they've been available for that length of time. Hope you manage to get sorted.
I think some travel agents still don't realise that the direct DLP Eurostar goes on sale a lot earlier than other routes. I've just looked at your dates and a dummy booking for 2A+2C works out cheaper in Standard Premier than Standard although there are less than 10 seats available so if you want them I'd book ASAP. The alternative is to wait until nearer the time when the indirect trains go on sale - these are often cheaper and others who've travelled this way say it's very easy.