Market hours for the London Stock Exchange are 8am to 4:30pm. You can place limit and stop loss orders for UK securities outside of these hours, but they will only be processed during market hours. We cannot accept stop loss or limit orders for international securities.
You can place fund orders at any time, but they will not be executed until the next valuation point. This is usually the next business day, but some funds are priced weekly so you should check the fund’s factsheet for the pricing frequency.