Yes, outdoor serving is allowed!
Time until the next changes at the 17th of May
"Indoor hospitality will reopen - and as in Step 2, venues will not have to serve a substantial meal with alcoholic drinks; nor will there be a curfew. Customers will, however, have to order, eat and drink while seated."
"Hospitality venues will be allowed to serve people outdoors at Step 2 and there will be no need for customers to order a substantial meal with alcoholic drinks and no curfew, although customers must order, eat and drink while seated (‘table service’)."